# Sinch in May 2021: incidents, uptime and changes

> Sinch in May 2021: 31 incidents on its status page (3 major or critical), 98.91% free of major or critical incidents (vendor-reported). From Rewindex’s archive of Sinch’s status, pricing and policy pages.

Canonical: https://rewindex.com/company/sinch/2021/05
Last updated: 2021-06-01T00:00:00Z

- Incidents posted: 31 (major/critical: 3) · Maintenance: 47
- By vendor impact label: critical 2, major 1, minor 26, none 2
- Uptime (vendor-reported): 98.91% free of major/critical incidents, 43.13% free of any incident; outage time 8 h 4 min, incident time 17.6 days
- Price changes: 0 · Pricing/legal/trust page changes: 0 · Deprecations: 0 · CVEs: 0
- Previous month: [April 2021](https://rewindex.com/company/sinch/2021/04.md) · Next: [June 2021](https://rewindex.com/company/sinch/2021/06.md) · [All months](https://rewindex.com/company/sinch/reports.md) · [Sinch](https://rewindex.com/company/sinch.md)

_Uptime: Derived from the incidents the vendor posted on its own status page, not measured by us. A minute counts as an outage minute when a major or critical incident (as the vendor labelled it) was open; incident minutes include minor ones too. Maintenance and incidents marked "no impact" are left out, overlapping incidents are merged, a resolved incident counts for at most 7 days, and one still open with no resolution counts for at most 24 hours._

## Major and critical incidents

| Incident | Impact (vendor label) | Started (UTC) | Resolved (UTC) | Duration | Status |
| --- | --- | --- | --- | --- | --- |
| [Delivery issue Telcel Mexico](https://rewindex.com/company/sinch/incidents/jj02znl4lrml.md) | critical | 2021-05-15 15:52 UTC | 2021-05-15 20:44 UTC | 4.9 h | resolved |
| [Delivery Issue Brazil - Claro](https://rewindex.com/company/sinch/incidents/gj8c5mvn37yn.md) | critical | 2021-05-15 17:05 UTC | 2021-05-15 18:19 UTC | 1.2 h | resolved |
| [Delivery Issue Algeria - Wataniya](https://rewindex.com/company/sinch/incidents/s7bjyj5jpjcp.md) | major | 2021-05-28 22:34 UTC | 2021-05-29 01:46 UTC | 3.2 h | resolved |

## All incidents

| Incident | Impact (vendor label) | Started (UTC) | Resolved (UTC) | Duration | Status |
| --- | --- | --- | --- | --- | --- |
| [Degraded performance - Rogers Wireless CA](https://rewindex.com/company/sinch/incidents/86k9f4kkxff0.md) | minor | 2021-05-02 01:11 UTC | 2021-05-02 02:14 UTC | 1.1 h | resolved |
| [Delivery issues - Vodafone Egypt](https://rewindex.com/company/sinch/incidents/8fq78xd0z770.md) | minor | 2021-05-02 11:24 UTC | 2021-05-02 19:46 UTC | 8.4 h | resolved |
| [Degraded performance - Rogers Wireless and Fido CA](https://rewindex.com/company/sinch/incidents/k6b6ttxkl5sd.md) | minor | 2021-05-04 18:10 UTC | 2021-05-05 03:40 UTC | 9.5 h | resolved |
| [Degraded Performance - Telekom Germany](https://rewindex.com/company/sinch/incidents/glx8zzvp2vr2.md) | minor | 2021-05-04 18:48 UTC | 2021-05-05 00:15 UTC | 5.5 h | resolved |
| [Flashcall Degradation - Indonesia](https://rewindex.com/company/sinch/incidents/m55b07q2zr1v.md) | minor | 2021-05-06 07:13 UTC | 2021-05-06 14:00 UTC | 6.8 h | resolved |
| [Degraded performance - Rogers Wireless and Fido CA](https://rewindex.com/company/sinch/incidents/m31n35mpbbxv.md) | minor | 2021-05-07 13:13 UTC | 2021-05-08 03:23 UTC | 14 h | resolved |
| [Delivery Issue Iraq - Asiacell](https://rewindex.com/company/sinch/incidents/21th8tm8pql1.md) | minor | 2021-05-08 03:14 UTC | 2021-05-08 19:31 UTC | 16 h | resolved |
| [Service Notification - Etisalat Egypt](https://rewindex.com/company/sinch/incidents/53pzpfh2w4s3.md) | minor | 2021-05-09 07:58 UTC | 2021-05-13 18:13 UTC | 4 d | resolved |
| [Sinch Operator Notification - Sprint US](https://rewindex.com/company/sinch/incidents/ggr3fnl1gxys.md) | minor | 2021-05-09 14:43 UTC | 2021-05-09 18:45 UTC | 4.0 h | resolved |
| [Delivery issue Telcel Mexico](https://rewindex.com/company/sinch/incidents/fh8yn5j33d03.md) | minor | 2021-05-11 00:09 UTC | 2021-05-11 02:11 UTC | 2.0 h | resolved |
| [Delivery issue Telcel Mexico](https://rewindex.com/company/sinch/incidents/gx2gvdyqj0pf.md) | none | 2021-05-11 07:44 UTC | 2021-05-11 11:48 UTC | 4.1 h | resolved |
| [Sinch Incident - Degradation to V-SMS services](https://rewindex.com/company/sinch/incidents/tx59lq4p3y8d.md) | minor | 2021-05-12 11:51 UTC | 2021-05-12 15:51 UTC | 4.0 h | resolved |
| [Delivery issue Brazil - Claro](https://rewindex.com/company/sinch/incidents/xv63r1hpb2gg.md) | minor | 2021-05-12 15:57 UTC | 2021-05-12 20:20 UTC | 4.4 h | resolved |
| [Delivery Issue Iraq - Asiacell](https://rewindex.com/company/sinch/incidents/50khb4qkf84r.md) | minor | 2021-05-12 20:41 UTC | 2021-05-13 18:11 UTC | 22 h | resolved |
| [Sinch notification - Whatsapp](https://rewindex.com/company/sinch/incidents/70p9xll20llx.md) | minor | 2021-05-13 15:40 UTC | 2021-05-14 10:36 UTC | 19 h | resolved |
| [Delivery Issue Brazil - Claro](https://rewindex.com/company/sinch/incidents/4v8hfpbcpf5k.md) | minor | 2021-05-14 20:06 UTC | 2021-05-15 03:19 UTC | 7.2 h | resolved |
| [Delivery issue Telcel Mexico](https://rewindex.com/company/sinch/incidents/jj02znl4lrml.md) | critical | 2021-05-15 15:52 UTC | 2021-05-15 20:44 UTC | 4.9 h | resolved |
| [Delivery Issue Brazil - Claro](https://rewindex.com/company/sinch/incidents/gj8c5mvn37yn.md) | critical | 2021-05-15 17:05 UTC | 2021-05-15 18:19 UTC | 1.2 h | resolved |
| [Service Notification - Dashboard](https://rewindex.com/company/sinch/incidents/qjkwp353k005.md) | minor | 2021-05-17 12:54 UTC | 2021-05-19 05:20 UTC | 40 h | resolved |
| [Operator notification - Rogers Wireless](https://rewindex.com/company/sinch/incidents/zj3ql7q81p3b.md) | none | 2021-05-17 20:00 UTC | 2021-05-17 20:00 UTC | 0 min | resolved |
| [Service Notification - Dashboard](https://rewindex.com/company/sinch/incidents/q92ttbms8pyv.md) | minor | 2021-05-19 12:44 UTC | 2021-05-19 15:05 UTC | 2.4 h | resolved |
| [Delivery Issue Algeria - Wataniya](https://rewindex.com/company/sinch/incidents/f2smvwj6xwgk.md) | minor | 2021-05-23 14:45 UTC | 2021-05-28 06:34 UTC | 5 d | resolved |
| [Flashcall and PSTN Performance Degradation - Mexico](https://rewindex.com/company/sinch/incidents/r3y4mmnz7dlp.md) | minor | 2021-05-24 08:03 UTC | 2021-05-24 11:46 UTC | 3.7 h | resolved |
| [Flashcall Degradation - Uzbekistan](https://rewindex.com/company/sinch/incidents/v24tbj3wfyg3.md) | minor | 2021-05-24 08:35 UTC | 2021-06-07 13:47 UTC | 14 d | resolved |
| [Delivery Issues Turkey](https://rewindex.com/company/sinch/incidents/vn87tg99xwgg.md) | minor | 2021-05-25 09:44 UTC | 2021-05-26 11:51 UTC | 26 h | resolved |
| [Delivery Issues Mexico - Telcel](https://rewindex.com/company/sinch/incidents/6kmrz7rt92qg.md) | minor | 2021-05-25 10:38 UTC | 2021-05-26 10:47 UTC | 24 h | resolved |
| [Delivery Issues - Italy](https://rewindex.com/company/sinch/incidents/08gg9pg62mjf.md) | minor | 2021-05-25 12:33 UTC | 2021-05-26 10:29 UTC | 22 h | resolved |
| [Service Notification - Dashboard](https://rewindex.com/company/sinch/incidents/v1ldt8rzfzwg.md) | minor | 2021-05-27 07:10 UTC | 2021-05-27 07:32 UTC | 22 min | resolved |
| [Degraded Performance - Rogers Wireless & Bell Canada](https://rewindex.com/company/sinch/incidents/s5tszdslth79.md) | minor | 2021-05-28 15:35 UTC | 2021-05-29 06:29 UTC | 15 h | resolved |
| [Delivery Issue Algeria - Wataniya](https://rewindex.com/company/sinch/incidents/s7bjyj5jpjcp.md) | major | 2021-05-28 22:34 UTC | 2021-05-29 01:46 UTC | 3.2 h | resolved |
| [Service Notification - Dashboard](https://rewindex.com/company/sinch/incidents/fqz32wx11fkv.md) | minor | 2021-05-31 08:04 UTC | 2021-05-31 12:18 UTC | 4.2 h | resolved |

## Maintenance

| Incident | Impact (vendor label) | Started (UTC) | Resolved (UTC) | Duration | Status |
| --- | --- | --- | --- | --- | --- |
| [\[Scheduled\] External Maintenance - AT&T - US](https://rewindex.com/company/sinch/incidents/5zpzd5f8ftlz.md) | maintenance | 2021-05-03 06:12 UTC | not resolved | ongoing | unknown |
| [\[Scheduled\] External Maintenance - AT&T - US](https://rewindex.com/company/sinch/incidents/k1n2np7cw999.md) | maintenance | 2021-05-03 06:13 UTC | not resolved | ongoing | unknown |
| [\[Scheduled\] Updated New Schedule \[SSL Certificate Renewal and Installation\] WhatsApp EU API Gateway - 4th May 2021 @ 8:00-9:00 UTC](https://rewindex.com/company/sinch/incidents/3p41yglj8b80.md) | maintenance | 2021-05-04 08:00 UTC | 2021-05-04 09:00 UTC | 1.0 h | resolved |
| [\[Scheduled\] Updated New Schedule \[SSL Certificate Renewal and Installation\] WhatsApp US API Gateway - 4th May 2021 @ 10:00-11:00 UTC](https://rewindex.com/company/sinch/incidents/5p1m8n70vh62.md) | maintenance | 2021-05-04 10:01 UTC | 2021-05-04 11:00 UTC | 59 min | resolved |
| [\[Scheduled\] External Emergency Maintenance - Vodafone UK](https://rewindex.com/company/sinch/incidents/lkkdgtmz21nq.md) | maintenance | 2021-05-04 22:00 UTC | 2021-05-05 07:01 UTC | 9.0 h | resolved |
| [\[Scheduled\] External Maintenance - Toll Free Number Provider](https://rewindex.com/company/sinch/incidents/fxkt035zm5t8.md) | maintenance | 2021-05-05 03:00 UTC | 2021-05-05 07:00 UTC | 4.0 h | resolved |
| [\[Scheduled\] External Maintenance - AT&T - US](https://rewindex.com/company/sinch/incidents/pmyt1ydnqlw0.md) | maintenance | 2021-05-05 04:00 UTC | 2021-05-05 11:00 UTC | 7.0 h | resolved |
| [\[Scheduled\] External Emergency Maintenance - Vodafone UK](https://rewindex.com/company/sinch/incidents/29s8zwkqn6z9.md) | maintenance | 2021-05-05 20:00 UTC | 2021-05-05 22:00 UTC | 2.0 h | resolved |
| [\[Scheduled\] External Maintenance - AT&T - US](https://rewindex.com/company/sinch/incidents/06zl9m0crc5n.md) | maintenance | 2021-05-06 04:01 UTC | 2021-05-06 11:00 UTC | 7.0 h | resolved |
| [\[Scheduled\] External Maintenance - US Long Number Provider](https://rewindex.com/company/sinch/incidents/4bb7g55338xg.md) | maintenance | 2021-05-07 04:00 UTC | 2021-05-07 05:00 UTC | 1.0 h | resolved |
| [\[Scheduled\] External Maintenance - US Toll Free Number Provider](https://rewindex.com/company/sinch/incidents/1jl49fkxf91b.md) | maintenance | 2021-05-08 04:00 UTC | 2021-05-08 10:00 UTC | 6.0 h | resolved |
| [\[Scheduled\] External Maintenance - AT&T - US](https://rewindex.com/company/sinch/incidents/tnkzm9ry8xsb.md) | maintenance | 2021-05-10 04:00 UTC | 2021-05-10 11:00 UTC | 7.0 h | resolved |
| [\[Scheduled\] External Maintenance - Sprint US](https://rewindex.com/company/sinch/incidents/0rhzdf7k5mft.md) | maintenance | 2021-05-11 05:00 UTC | 2021-05-11 13:30 UTC | 8.5 h | resolved |
| [\[Scheduled\] WhatsApp Routine Maintenance - EU](https://rewindex.com/company/sinch/incidents/7dlh92yp1csm.md) | maintenance | 2021-05-11 08:00 UTC | 2021-05-11 09:00 UTC | 1.0 h | resolved |
| [\[Scheduled\] Sinch Planned Maintenance: MMS](https://rewindex.com/company/sinch/incidents/0470x0094t21.md) | maintenance | 2021-05-11 08:01 UTC | 2021-05-11 10:00 UTC | 2.0 h | resolved |
| [\[Scheduled\] WhatsApp Routine Maintenance - US](https://rewindex.com/company/sinch/incidents/3mmzv1c3vmkr.md) | maintenance | 2021-05-11 10:00 UTC | 2021-05-11 11:00 UTC | 1.0 h | resolved |
| [\[Scheduled\] External Maintenance - AT&T - US](https://rewindex.com/company/sinch/incidents/4r4hx7bcm9d2.md) | maintenance | 2021-05-12 04:01 UTC | 2021-05-12 11:00 UTC | 7.0 h | resolved |
| [\[Scheduled\] External Maintenance - Toll Free Number Provider](https://rewindex.com/company/sinch/incidents/4jst6wv2tnh7.md) | maintenance | 2021-05-13 03:00 UTC | 2021-05-13 07:00 UTC | 4.0 h | resolved |
| [\[Scheduled\] External Maintenance - AT&T - US](https://rewindex.com/company/sinch/incidents/2tynklwlx9x4.md) | maintenance | 2021-05-13 04:00 UTC | 2021-05-13 11:00 UTC | 7.0 h | resolved |
| [\[Scheduled\] Sinch Scheduled Maintenance - Mblox Legacy](https://rewindex.com/company/sinch/incidents/kz825wqv35s0.md) | maintenance | 2021-05-13 09:00 UTC | 2021-05-13 09:30 UTC | 30 min | resolved |
| [\[Scheduled\] External Maintenance - US Long Number Provider](https://rewindex.com/company/sinch/incidents/h65xzvbxj5tm.md) | maintenance | 2021-05-18 06:01 UTC | 2021-05-18 10:00 UTC | 4.0 h | resolved |
| [\[Scheduled\] Scheduled Network Maintenance - Sinch Legacy Atlas IAD3 Site](https://rewindex.com/company/sinch/incidents/4mhg95nwcdyk.md) | maintenance | 2021-05-18 08:00 UTC | 2021-05-18 10:00 UTC | 2.0 h | resolved |
| [\[Scheduled\] External Maintenance - O2 UK](https://rewindex.com/company/sinch/incidents/cdfd066b6663.md) | maintenance | 2021-05-18 22:00 UTC | 2021-05-19 03:30 UTC | 5.5 h | resolved |
| [\[Scheduled\] External Maintenance - AT&T - US](https://rewindex.com/company/sinch/incidents/tml7n5z3kb51.md) | maintenance | 2021-05-19 04:00 UTC | 2021-05-19 11:01 UTC | 7.0 h | resolved |
| [\[Scheduled\] Internal Maintenance - Verizon - US](https://rewindex.com/company/sinch/incidents/3dp7qpx3gzlj.md) | maintenance | 2021-05-19 09:00 UTC | 2021-05-19 11:00 UTC | 2.0 h | resolved |
| [\[Scheduled\] External Maintenance - Toll Free Number Provider](https://rewindex.com/company/sinch/incidents/4spgtq492nm8.md) | maintenance | 2021-05-20 03:01 UTC | 2021-05-20 07:01 UTC | 4.0 h | resolved |
| [\[Scheduled\] External maintenance - AT&T - US](https://rewindex.com/company/sinch/incidents/v5qlmxyg92h0.md) | maintenance | 2021-05-20 04:03 UTC | 2021-05-20 11:00 UTC | 7.0 h | resolved |
| [\[Scheduled\] External Maintenance - T-Mobile US](https://rewindex.com/company/sinch/incidents/wg75t9n7n9vq.md) | maintenance | 2021-05-20 06:00 UTC | 2021-05-20 11:00 UTC | 5.0 h | resolved |
| [\[Scheduled\] External Maintenance - US Long Number Provider](https://rewindex.com/company/sinch/incidents/61rrtk4z4b39.md) | maintenance | 2021-05-21 04:00 UTC | 2021-05-21 05:00 UTC | 1.0 h | resolved |
| [\[Scheduled\] WhatsApp Routine Maintenance - EU](https://rewindex.com/company/sinch/incidents/3g1q9gjth720.md) | maintenance | 2021-05-25 08:00 UTC | 2021-05-25 09:00 UTC | 1.0 h | resolved |
| [\[Scheduled\] Sinch Scheduled Maintenance - US1 Site](https://rewindex.com/company/sinch/incidents/lfygg9dhblq6.md) | maintenance | 2021-05-25 08:00 UTC | 2021-05-25 11:01 UTC | 3.0 h | resolved |
| [\[Scheduled\] WhatsApp Routine Maintenance - US](https://rewindex.com/company/sinch/incidents/r4hs6y7ks560.md) | maintenance | 2021-05-25 10:00 UTC | 2021-05-25 11:00 UTC | 1.0 h | resolved |
| [\[Scheduled\] External Maintenance - AT&T - US](https://rewindex.com/company/sinch/incidents/bzsnxg6931r0.md) | maintenance | 2021-05-26 04:00 UTC | 2021-05-26 11:00 UTC | 7.0 h | resolved |
| [\[Scheduled\] External Maintenance - T-Mobile US](https://rewindex.com/company/sinch/incidents/rk02wzp6pz94.md) | maintenance | 2021-05-26 05:00 UTC | 2021-05-26 11:00 UTC | 6.0 h | resolved |
| [\[Scheduled\] Scheduled Reach Platform Maintenance](https://rewindex.com/company/sinch/incidents/xs5lfc6nfv6d.md) | maintenance | 2021-05-26 07:00 UTC | 2021-05-26 12:00 UTC | 5.0 h | resolved |
| [\[Scheduled\] Planned Maintenance - REST API](https://rewindex.com/company/sinch/incidents/mt9plbcz2qx7.md) | maintenance | 2021-05-26 08:00 UTC | 2021-05-26 10:00 UTC | 2.0 h | resolved |
| [\[Scheduled\] Sinch Maintenance Notification on our CA sites loadbalancers](https://rewindex.com/company/sinch/incidents/9lp5gwmjtmry.md) | maintenance | 2021-05-26 08:00 UTC | 2021-05-26 09:00 UTC | 1.0 h | resolved |
| [\[Scheduled\] \[Updated SSL Certificate Installation\] EU Sinch Gateways: HTTP NPLU (EU - 27th May 2021 @ 01:00-03:00 UTC)](https://rewindex.com/company/sinch/incidents/6lw4l9xgp8nk.md) | maintenance | 2021-05-27 01:00 UTC | 2021-05-27 03:00 UTC | 2.0 h | resolved |
| [\[Scheduled\] External Maintenance - Toll Free Number Provider](https://rewindex.com/company/sinch/incidents/5rhdhnb20nvf.md) | maintenance | 2021-05-27 03:01 UTC | 2021-05-27 07:00 UTC | 4.0 h | resolved |
| [\[Scheduled\] External Maintenance - AT&T - US](https://rewindex.com/company/sinch/incidents/zgz0xkm89y2z.md) | maintenance | 2021-05-27 04:01 UTC | 2021-05-27 11:00 UTC | 7.0 h | resolved |
| [\[Scheduled\] External Maintenance - T-Mobile US](https://rewindex.com/company/sinch/incidents/ppft9pmbrw3t.md) | maintenance | 2021-05-27 04:01 UTC | 2021-05-27 10:00 UTC | 6.0 h | resolved |
| [\[Scheduled\] Customer Portal routine maintenance](https://rewindex.com/company/sinch/incidents/6s116sgzcbsc.md) | maintenance | 2021-05-27 05:00 UTC | 2021-05-27 07:00 UTC | 2.0 h | resolved |
| [\[Scheduled\] \[Updated SSL Certificate Installation\] US/CA Sinch Gateways: SMPP, ENUM and HTTP SMS (US - 27th May 2021 @ 09:00-11:00 UTC)](https://rewindex.com/company/sinch/incidents/qtb6wgg9d44z.md) | maintenance | 2021-05-27 09:00 UTC | 2021-05-27 11:00 UTC | 2.0 h | resolved |
| [\[Scheduled\] \[Updated SSL Certificate Installation\] AU Sinch Gateways: SMPP and HTTP SMS (AU - 27th May 2021 @ 15:00-17:00 UTC)](https://rewindex.com/company/sinch/incidents/x10c0j4cy039.md) | maintenance | 2021-05-27 15:00 UTC | 2021-05-27 17:00 UTC | 2.0 h | resolved |
| [\[Scheduled\] Sinch Maintenance Notification on our AU sites loadbalancers](https://rewindex.com/company/sinch/incidents/dw8yqhqj47gx.md) | maintenance | 2021-05-27 15:00 UTC | 2021-05-27 16:00 UTC | 1.0 h | resolved |
| [\[Scheduled\] Sinch Maintenance Notification on our BR sites loadbalancers](https://rewindex.com/company/sinch/incidents/bw5fm81lq3kb.md) | maintenance | 2021-05-27 15:00 UTC | 2021-05-27 16:00 UTC | 1.0 h | resolved |
| [\[Scheduled\] External Maintenance - US Long Number Provider](https://rewindex.com/company/sinch/incidents/txqg0nzwc8fb.md) | maintenance | 2021-05-31 05:00 UTC | 2021-05-31 11:00 UTC | 6.0 h | resolved |

## Cite this

Sinch posted 31 status incidents in May 2021 (3 major or critical); 0 price changes and 0 notable page changes observed.

- Canonical URL: https://rewindex.com/company/sinch/2021/05
- Citation: Sinch, “Sinch in May 2021” (2021-05-01 00:00 UTC). Archived by Rewindex: https://rewindex.com/company/sinch/2021/05 (CC BY 4.0).
- Markdown link: `[Sinch: Sinch in May 2021 (2021-05-01)](https://rewindex.com/company/sinch/2021/05)`


---
Canonical: https://rewindex.com/company/sinch/2021/05 · Markdown: https://rewindex.com/company/sinch/2021/05.md · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T13:54:28.945Z