# Outages on October 21, 2024 (UTC)

> 43 incidents started on October 21, 2024 (UTC) on the status pages Rewindex archives, 9 labelled major or critical by the vendor (Make, Red Hat (incl. Quay.io), Sentry); 8 more were still open from earlier days.

Canonical: https://rewindex.com/outages/2024-10-21
Last updated: 2024-10-28T18:28:00Z

- Incidents started: 43 (major/critical: 9, other: 34) across 26 vendors
- Still open from earlier days: 8 · Maintenance windows: 23 · Detected outage events: 0
- By vendor impact label: critical 4, major 5, minor 29, none 5
- Previous day with incidents: [2024-10-20](https://rewindex.com/outages/2024-10-20.md) · Next: [2024-10-22](https://rewindex.com/outages/2024-10-22.md) · [All days](https://rewindex.com/outages.md)

Impact labels are the vendor’s own. Incidents come from each vendor’s status page; Rewindex does not measure outages.

## Incidents started this day

| Vendor | Incident | Impact (vendor label) | Started (UTC) | Resolved (UTC) | Status |
| --- | --- | --- | --- | --- | --- |
| [Make](https://rewindex.com/company/make.md) | [Delayed webhooks and scenario on US1-enterprise zone](https://rewindex.com/company/make/incidents/7fp2zqz807jk.md) | critical | 2024-10-21 14:49 UTC | 2024-10-21 17:27 UTC | resolved |
| [Red Hat (incl. Quay.io)](https://rewindex.com/company/red-hat.md) | [Quay.io Builds Unavailable](https://rewindex.com/company/red-hat/incidents/v96hv2r97jzm.md) | critical | 2024-10-21 15:31 UTC | 2024-10-21 17:48 UTC | resolved |
| [Sentry](https://rewindex.com/company/sentry.md) | [Elevated errors for ingestion](https://rewindex.com/company/sentry/incidents/tft6bj7h9yg8.md) | critical | 2024-10-21 17:05 UTC | 2024-10-21 19:19 UTC | resolved |
| [Make](https://rewindex.com/company/make.md) | [Issues with webhooks processing and scenario executions on EU1-enterprise zone](https://rewindex.com/company/make/incidents/n5xw6k0j3br5.md) | critical | 2024-10-21 23:09 UTC | 2024-10-22 00:01 UTC | resolved |
| [Smartsheet](https://rewindex.com/company/smartsheet.md) | [WorkApps Degraded Performance](https://rewindex.com/company/smartsheet/incidents/9dnzzx5h14bf.md) | major | 2024-10-21 09:00 UTC | 2024-10-21 11:48 UTC | resolved |
| [Vanta](https://rewindex.com/company/vanta.md) | [Issues getting computers from Rippling MDM](https://rewindex.com/company/vanta/incidents/vzwpclsf9152.md) | major | 2024-10-21 18:28 UTC | 2024-10-28 22:46 UTC | resolved |
| [Anthropic](https://rewindex.com/company/anthropic.md) | [Intermittent errors on docs.anthropic.com](https://rewindex.com/company/anthropic/incidents/9h8b9q9lnpfh.md) | major | 2024-10-21 19:20 UTC | 2024-10-21 20:19 UTC | resolved |
| [Claude](https://rewindex.com/company/claude.md) | [Intermittent errors on docs.anthropic.com](https://rewindex.com/company/claude/incidents/9h8b9q9lnpfh.md) | major | 2024-10-21 19:20 UTC | 2024-10-21 20:19 UTC | resolved |
| [WorkOS](https://rewindex.com/company/workos.md) | ["Invalid Signature" errors for some SAML connections](https://rewindex.com/company/workos/incidents/08flvmhxt6jq.md) | major | 2024-10-21 22:44 UTC | 2024-10-21 23:29 UTC | resolved |
| [Sinch](https://rewindex.com/company/sinch.md) | [Delivery Issue Brazil - Claro](https://rewindex.com/company/sinch/incidents/y623nrywdjqz.md) | minor | 2024-10-21 06:43 UTC | 2024-10-21 07:50 UTC | resolved |
| [Scaleway](https://rewindex.com/company/scaleway.md) | [\[Storage\]-Latencies on fr-par following electrical reboot of machines](https://rewindex.com/company/scaleway/incidents/2dphtd71m0h7.md) | minor | 2024-10-21 08:55 UTC | 2024-10-21 12:39 UTC | resolved |
| [Gorgias](https://rewindex.com/company/gorgias.md) | [Degraded performance and errors on views and bulk actions](https://rewindex.com/company/gorgias/incidents/p36lm70jxx76.md) | minor | 2024-10-21 09:42 UTC | 2024-10-21 12:59 UTC | resolved |
| [Twilio](https://rewindex.com/company/twilio.md) | [SMS Delivery Failures from Twilio Short Codes and Toll Free Numbers to AT&T Network in the US](https://rewindex.com/company/twilio/incidents/jnf8mp4mfj1b.md) | minor | 2024-10-21 10:24 UTC | 2024-10-21 19:41 UTC | resolved |
| [Twilio](https://rewindex.com/company/twilio.md) | [SMS Delivery Delays from Twilio Tollfree Numbers to AT&T Network in the US](https://rewindex.com/company/twilio/incidents/245288dkbvjm.md) | minor | 2024-10-21 10:43 UTC | 2024-10-21 11:59 UTC | resolved |
| [Scaleway](https://rewindex.com/company/scaleway.md) | [\[Support\] - Phone unavaibility](https://rewindex.com/company/scaleway/incidents/cjgzfthtktt1.md) | minor | 2024-10-21 10:48 UTC | 2024-10-21 16:00 UTC | resolved |
| [Plivo](https://rewindex.com/company/plivo.md) | [Delivery delay on Outbound SMS towards US phone numbers](https://rewindex.com/company/plivo/incidents/g57xhb0vsvz1.md) | minor | 2024-10-21 11:25 UTC | 2024-10-21 19:32 UTC | resolved |
| [Vonage](https://rewindex.com/company/vonage.md) | [Mexico SMS - Delivery degradation towards MOVISTAR](https://rewindex.com/company/vonage/incidents/vvp3rkmkc2vd.md) | minor | 2024-10-21 11:34 UTC | 2024-10-21 13:40 UTC | resolved |
| [Vonage](https://rewindex.com/company/vonage.md) | [Dashboard service Issue](https://rewindex.com/company/vonage/incidents/t4m1l257yhf3.md) | minor | 2024-10-21 11:39 UTC | 2024-10-21 15:27 UTC | resolved |
| [Twilio](https://rewindex.com/company/twilio.md) | [SMS Delivery Delays to Telefonica/Movistar Network in Mexico](https://rewindex.com/company/twilio/incidents/v804p7y99qf2.md) | minor | 2024-10-21 11:49 UTC | 2024-10-21 14:49 UTC | resolved |
| [Akamai](https://rewindex.com/company/akamai.md) | [Edge Delivery issues in Europe and the USA](https://rewindex.com/company/akamai/incidents/1v4dldlxqy9f.md) | minor | 2024-10-21 12:09 UTC | 2024-12-17 15:32 UTC | resolved |
| [Scaleway](https://rewindex.com/company/scaleway.md) | [\[Storage\] - Some Upload failed with unexpected InvalidStorageClass error](https://rewindex.com/company/scaleway/incidents/4g567x0zs872.md) | minor | 2024-10-21 12:12 UTC | 2024-10-21 12:19 UTC | resolved |
| [Vonage](https://rewindex.com/company/vonage.md) | [USA SMS - Delivery degradation affecting subset of short codes towards AT&T](https://rewindex.com/company/vonage/incidents/ycrjz4wf0c97.md) | minor | 2024-10-21 12:31 UTC | 2024-10-21 23:53 UTC | resolved |
| [Scaleway](https://rewindex.com/company/scaleway.md) | [\[WEBHOSTING\] Database inaccessible](https://rewindex.com/company/scaleway/incidents/921khdfh7zm6.md) | minor | 2024-10-21 12:35 UTC | 2024-10-21 13:32 UTC | resolved |
| [Twilio](https://rewindex.com/company/twilio.md) | [Inbound SMS Failures to a Subset of Twilio Sweden Phone Numbers](https://rewindex.com/company/twilio/incidents/6k66d8b8by6y.md) | minor | 2024-10-21 12:46 UTC | 2024-10-22 10:32 UTC | resolved |
| [Typeform](https://rewindex.com/company/typeform.md) | [Typeform Results/Summary Report - Unavailable](https://rewindex.com/company/typeform/incidents/dq56mtd9qtd5.md) | minor | 2024-10-21 13:32 UTC | 2024-10-21 16:01 UTC | resolved |
| [Ably](https://rewindex.com/company/ably.md) | [Elevated channel attach failure rates in ap-southeast-2](https://rewindex.com/company/ably/incidents/my9w13rdy8l5.md) | minor | 2024-10-21 13:47 UTC | 2024-10-21 14:08 UTC | resolved |
| [LaunchDarkly](https://rewindex.com/company/launchdarkly.md) | [MS Teams Integration Functionality Degraded](https://rewindex.com/company/launchdarkly/incidents/2ssgwwwy2rdk.md) | minor | 2024-10-21 13:48 UTC | 2024-10-21 14:35 UTC | resolved |
| [Anthropic](https://rewindex.com/company/anthropic.md) | [Elevated Sonnet 3.5 and Haiku error rate](https://rewindex.com/company/anthropic/incidents/wt8hdbnvl37j.md) | minor | 2024-10-21 13:57 UTC | 2024-10-21 18:54 UTC | resolved |
| [Claude](https://rewindex.com/company/claude.md) | [Elevated Sonnet 3.5 and Haiku error rate](https://rewindex.com/company/claude/incidents/wt8hdbnvl37j.md) | minor | 2024-10-21 13:57 UTC | 2024-10-21 18:54 UTC | resolved |
| [Help Scout](https://rewindex.com/company/help-scout.md) | [Inbound Email Delays](https://rewindex.com/company/help-scout/incidents/mrgr25w9cyln.md) | minor | 2024-10-21 14:41 UTC | 2024-10-21 14:48 UTC | resolved |
| [Stripe](https://rewindex.com/company/stripe.md) | [Delayed reconciliation of Great British Pounds (GBP) top-ups](https://rewindex.com/company/stripe/incidents/lxsq5dnj1ss0.md) | minor | 2024-10-21 15:26 UTC | 2024-10-21 18:44 UTC | resolved |
| [Courier](https://rewindex.com/company/courier.md) | [Message Logs Delays](https://rewindex.com/company/courier/incidents/qwmn9bkb8r7g.md) | minor | 2024-10-21 15:56 UTC | 2024-10-21 18:51 UTC | resolved |
| [Twilio](https://rewindex.com/company/twilio.md) | [Users Unable to Add Decimals During Account Billing Top-Ups](https://rewindex.com/company/twilio/incidents/wm6nj5wn48jm.md) | minor | 2024-10-21 16:17 UTC | 2024-10-21 21:52 UTC | resolved |
| [Sinch](https://rewindex.com/company/sinch.md) | [Delivery Issue Brazil - SurfTelecom](https://rewindex.com/company/sinch/incidents/yhqxksm35vqf.md) | minor | 2024-10-21 19:20 UTC | 2024-10-22 00:50 UTC | resolved |
| [Twilio](https://rewindex.com/company/twilio.md) | [SMS Delivery Delays to Surf Telecom Network in Brazil](https://rewindex.com/company/twilio/incidents/sgqt1d9mkwww.md) | minor | 2024-10-21 19:41 UTC | 2024-10-22 00:29 UTC | resolved |
| [Twilio](https://rewindex.com/company/twilio.md) | [SMS Delivery Failures to AT&T Network in the US from a Subset of Longcodes](https://rewindex.com/company/twilio/incidents/wzjmpthblxjp.md) | minor | 2024-10-21 21:17 UTC | 2024-10-22 14:24 UTC | resolved |
| [Twilio](https://rewindex.com/company/twilio.md) | [SMS Delivery Failure to Multiple Networks in Bahrain](https://rewindex.com/company/twilio/incidents/tnwf09d162q6.md) | minor | 2024-10-21 23:48 UTC | 2024-10-22 10:05 UTC | resolved |
| [Twilio](https://rewindex.com/company/twilio.md) | [MMS Delivery Failures to Multiple Networks in Australia over a Subset of Longcodes](https://rewindex.com/company/twilio/incidents/5pmfgq9459vf.md) | minor | 2024-10-21 23:55 UTC | 2024-10-23 20:50 UTC | resolved |
| [Greenhouse](https://rewindex.com/company/greenhouse.md) | [Partial Service Disruption](https://rewindex.com/company/greenhouse/incidents/6zy5xjzwcmt1.md) | none | 2024-10-21 13:24 UTC | 2024-10-21 18:23 UTC | resolved |
| [Daily](https://rewindex.com/company/daily.md) | [Missing meeting webhook deliveries](https://rewindex.com/company/daily/incidents/h116m8lx0vbd.md) | none | 2024-10-21 17:50 UTC | 2024-10-22 02:38 UTC | resolved |
| [CircleCI](https://rewindex.com/company/circleci.md) | [Investigating suspected UI showing pipelines without workflows](https://rewindex.com/company/circleci/incidents/1md25tdgwwc7.md) | none | 2024-10-21 18:19 UTC | 2024-10-21 18:41 UTC | resolved |
| [QuickBooks Online](https://rewindex.com/company/quickbooks-online.md) | [Some customers are not able to access Payroll within Australian QuickBooks Online](https://rewindex.com/company/quickbooks-online/incidents/h7skp5g0clkl.md) | none | 2024-10-21 23:25 UTC | 2024-10-22 01:29 UTC | resolved |
| [Coralogix](https://rewindex.com/company/coralogix.md) | [Data usage page does not load](https://rewindex.com/company/coralogix/incidents/np90glrcf8tn.md) | none | 2024-10-21 23:44 UTC | 2024-10-22 13:02 UTC | resolved |

## Still open from earlier days

| Vendor | Incident | Impact (vendor label) | Started (UTC) | Resolved (UTC) | Status |
| --- | --- | --- | --- | --- | --- |
| [SingleStore](https://rewindex.com/company/singlestore.md) | [Capacity issues in Azure Southcentral](https://rewindex.com/company/singlestore/incidents/6710f7d488dc60053178ed7d.md) | major | 2024-10-17 11:41 UTC | 2024-12-19 05:34 UTC | resolved |
| [Gorgias](https://rewindex.com/company/gorgias.md) | [Discrepancies in automation rate and Automate analytics](https://rewindex.com/company/gorgias/incidents/khg7qbyklb15.md) | minor | 2024-10-16 17:03 UTC | 2024-11-05 17:05 UTC | resolved |
| [Twilio](https://rewindex.com/company/twilio.md) | [SMS Delivery Delays and Failures to Yemen Mobile Network in Yemen](https://rewindex.com/company/twilio/incidents/nrd3py9c8l4b.md) | minor | 2024-10-16 19:35 UTC | 2024-10-23 07:32 UTC | resolved |
| [Vonage](https://rewindex.com/company/vonage.md) | [China SMS - Partial degradation of Pre-Registered brands](https://rewindex.com/company/vonage/incidents/0ddl5kzgxnpx.md) | minor | 2024-10-18 12:26 UTC | 2024-12-23 03:25 UTC | resolved |
| [Twingate](https://rewindex.com/company/twingate.md) | [Jamf Device Integration Issue](https://rewindex.com/company/twingate/incidents/hflzt428n6nv.md) | minor | 2024-10-20 03:52 UTC | 2024-10-21 21:01 UTC | resolved |
| [Twilio](https://rewindex.com/company/twilio.md) | [SMS Delivery Delays to B-Mobile Network in Bhutan](https://rewindex.com/company/twilio/incidents/wllcfvycd8ts.md) | minor | 2024-10-20 15:12 UTC | 2024-10-21 17:03 UTC | resolved |
| [Linode (Akamai)](https://rewindex.com/company/linode-akamai.md) | [Scheduled Network Maintenance - EU-Central (Frankfurt)](https://rewindex.com/company/linode-akamai/incidents/q0rmxw25w7gd.md) | none | 2024-10-16 15:28 UTC | 2024-10-30 13:07 UTC | resolved |
| [Bitrise](https://rewindex.com/company/bitrise.md) | [Apple ID Connection Errors](https://rewindex.com/company/bitrise/incidents/yjbmfwxwwh94.md) | none | 2024-10-18 21:13 UTC | 2024-10-21 19:49 UTC | resolved |

## Maintenance

| Vendor | Incident | Impact (vendor label) | Started (UTC) | Resolved (UTC) | Status |
| --- | --- | --- | --- | --- | --- |
| [Sinch](https://rewindex.com/company/sinch.md) | [\[Scheduled\] 2FA Activation and Device Fingerprint.](https://rewindex.com/company/sinch/incidents/dg4ln8nnxrdh.md) | maintenance | 2024-10-21 00:00 UTC | 2024-10-21 00:01 UTC | resolved |
| [Stripe](https://rewindex.com/company/stripe.md) | [\[Scheduled\] Scheduled maintenance for Swish - Swedbank](https://rewindex.com/company/stripe/incidents/q0lk3pl25m1j.md) | maintenance | 2024-10-21 01:00 UTC | 2024-10-21 03:30 UTC | resolved |
| [Sinch](https://rewindex.com/company/sinch.md) | [\[Scheduled\] External Maintenance - T-Mobile United States](https://rewindex.com/company/sinch/incidents/rz643q0s77hy.md) | maintenance | 2024-10-21 03:00 UTC | 2024-10-21 11:01 UTC | resolved |
| [Sinch](https://rewindex.com/company/sinch.md) | [\[Scheduled\] External Maintenance - AT&T United States](https://rewindex.com/company/sinch/incidents/q0drg40y8jf7.md) | maintenance | 2024-10-21 03:00 UTC | 2024-10-21 09:00 UTC | resolved |
| [Twilio](https://rewindex.com/company/twilio.md) | [\[Scheduled\] United States SMS and MMS Carrier Maintenance - T-Mobile](https://rewindex.com/company/twilio/incidents/jxc0q5m3llyv.md) | maintenance | 2024-10-21 03:00 UTC | 2024-10-21 11:00 UTC | resolved |
| [Vonage](https://rewindex.com/company/vonage.md) | [\[Scheduled\] USA SMS, 10DLC & MMS - Planned Maintenance affecting AT&T USA](https://rewindex.com/company/vonage/incidents/hxvsm999f3q5.md) | maintenance | 2024-10-21 03:00 UTC | 2024-10-21 09:00 UTC | resolved |
| [Vonage](https://rewindex.com/company/vonage.md) | [\[Scheduled\] USA SMS, 10DLC & MMS - Planned Maintenance affecting AT&T USA](https://rewindex.com/company/vonage/incidents/frr1xz1wctkv.md) | maintenance | 2024-10-21 03:00 UTC | 2024-10-21 08:00 UTC | resolved |
| [Twilio](https://rewindex.com/company/twilio.md) | [\[Scheduled\] United States SMS Carrier Maintenance - AT&T](https://rewindex.com/company/twilio/incidents/l457xrnfptn3.md) | maintenance | 2024-10-21 03:01 UTC | 2024-10-22 09:02 UTC | resolved |
| [Vonage](https://rewindex.com/company/vonage.md) | [\[Scheduled\] USA SMS - Planned Maintenance affecting  T-Mobile](https://rewindex.com/company/vonage/incidents/mjk11k5hynhx.md) | maintenance | 2024-10-21 03:01 UTC | 2024-10-21 11:00 UTC | resolved |
| [Coralogix](https://rewindex.com/company/coralogix.md) | [\[Scheduled\] Kafka Infrastructure maintenance - EU1/EU2](https://rewindex.com/company/coralogix/incidents/sszwt418k60y.md) | maintenance | 2024-10-21 05:30 UTC | 2024-10-23 09:30 UTC | resolved |
| [Plivo](https://rewindex.com/company/plivo.md) | [\[Scheduled\] Scheduled Maintenance : Service degradation on Inbound/Outbound MMS towards US phone numbers](https://rewindex.com/company/plivo/incidents/nrvxj95r1lgb.md) | maintenance | 2024-10-21 07:00 UTC | 2024-10-23 12:00 UTC | resolved |
| [Scaleway](https://rewindex.com/company/scaleway.md) | [\[Scheduled\] \[Webhosting-Dedibox\] Maintenance on PF 1005](https://rewindex.com/company/scaleway/incidents/xwjbhwktg9f3.md) | maintenance | 2024-10-21 09:00 UTC | 2024-10-21 09:30 UTC | resolved |
| [Bitrise](https://rewindex.com/company/bitrise.md) | [\[Scheduled\] Key-Value Cache Reset for Linux VMs](https://rewindex.com/company/bitrise/incidents/td243swg9nv8.md) | maintenance | 2024-10-21 09:00 UTC | 2024-10-21 10:00 UTC | resolved |
| [Sinch](https://rewindex.com/company/sinch.md) | [\[Scheduled\] Campaigns Application Maintenance](https://rewindex.com/company/sinch/incidents/bvlrdrdklzhf.md) | maintenance | 2024-10-21 10:10 UTC | 2024-10-21 11:00 UTC | resolved |
| [Sinch](https://rewindex.com/company/sinch.md) | [\[Scheduled\] Internal Maintenance - Migration of legacy connections - M1 Singapore](https://rewindex.com/company/sinch/incidents/fhcsvhvty6sj.md) | maintenance | 2024-10-21 13:00 UTC | 2024-10-21 15:00 UTC | resolved |
| [Twilio](https://rewindex.com/company/twilio.md) | [\[Scheduled\] Russia SMS Carrier Maintenance - MegaFon and Yota](https://rewindex.com/company/twilio/incidents/6xhrrt676mk4.md) | maintenance | 2024-10-21 20:00 UTC | 2024-10-22 00:00 UTC | resolved |
| [Vonage](https://rewindex.com/company/vonage.md) | [\[Scheduled\] Russia SMS - Planned maintenance affecting Tele2](https://rewindex.com/company/vonage/incidents/9jj32lyllclf.md) | maintenance | 2024-10-21 20:00 UTC | 2024-10-22 00:00 UTC | resolved |
| [Vonage](https://rewindex.com/company/vonage.md) | [\[Scheduled\] Russia SMS - Planned maintenance affecting Megafon](https://rewindex.com/company/vonage/incidents/zk1bxy43vf7l.md) | maintenance | 2024-10-21 20:01 UTC | 2024-10-22 00:01 UTC | resolved |
| [Twilio](https://rewindex.com/company/twilio.md) | [\[Scheduled\] Russia SMS Carrier Maintenance - Beeline](https://rewindex.com/company/twilio/incidents/mc34qgq2blrs.md) | maintenance | 2024-10-21 21:00 UTC | 2024-10-23 00:00 UTC | resolved |
| [Vonage](https://rewindex.com/company/vonage.md) | [\[Scheduled\] Russia SMS - Planned maintenance affecting Beeline](https://rewindex.com/company/vonage/incidents/8mq4j710zvqh.md) | maintenance | 2024-10-21 21:00 UTC | 2024-10-22 00:01 UTC | resolved |
| [Twilio](https://rewindex.com/company/twilio.md) | [\[Scheduled\] Qatar SMS Carrier Maintenance - Vodafone](https://rewindex.com/company/twilio/incidents/80tq66xxwwsn.md) | maintenance | 2024-10-21 21:01 UTC | 2024-10-22 03:00 UTC | resolved |
| [Twilio](https://rewindex.com/company/twilio.md) | [\[Scheduled\] United Kingdom Account Security Carrier Partner Maintenance - Vodafone](https://rewindex.com/company/twilio/incidents/52hvx2wxmc0s.md) | maintenance | 2024-10-21 22:00 UTC | 2024-10-22 03:15 UTC | resolved |
| [Vonage](https://rewindex.com/company/vonage.md) | [\[Scheduled\] Denmark SMS - Planned maintenance affecting Telenor Denmark](https://rewindex.com/company/vonage/incidents/v2mh9t138qvp.md) | maintenance | 2024-10-21 23:00 UTC | 2024-10-22 05:00 UTC | resolved |

## Cite this

43 vendor-reported incidents started on 2024-10-21 (UTC) across 26 vendors, 9 labelled major or critical by the vendor.

- Canonical URL: https://rewindex.com/outages/2024-10-21
- Citation: Rewindex daily outage roundup, “Outages on October 21, 2024” (2024-10-21 00:00 UTC). Archived by Rewindex: https://rewindex.com/outages/2024-10-21 (CC BY 4.0).
- Markdown link: `[Rewindex daily outage roundup: Outages on October 21, 2024 (2024-10-21)](https://rewindex.com/outages/2024-10-21)`


---
Canonical: https://rewindex.com/outages/2024-10-21 · Markdown: https://rewindex.com/outages/2024-10-21.md · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T13:14:40.635Z