# Twilio in September 2019: incidents, uptime and changes

> Twilio in September 2019: 42 incidents on its status page (3 major or critical), 98.74% free of major or critical incidents (vendor-reported). From Rewindex’s archive of Twilio’s status, pricing and policy pages.

Canonical: https://rewindex.com/company/twilio/2019/09
Last updated: 2019-10-01T00:00:00Z

- Incidents posted: 42 (major/critical: 3) · Maintenance: 21
- By vendor impact label: critical 2, major 1, minor 35, none 4
- Uptime (vendor-reported): 98.74% free of major/critical incidents, 72.98% free of any incident; outage time 9 h 2 min, incident time 8.1 days
- Price changes: 0 · Pricing/legal/trust page changes: 0 · Deprecations: 0 · CVEs: 0
- Previous month: [August 2019](https://rewindex.com/company/twilio/2019/08.md) · Next: [October 2019](https://rewindex.com/company/twilio/2019/10.md) · [All months](https://rewindex.com/company/twilio/reports.md) · [Twilio](https://rewindex.com/company/twilio.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 |
| --- | --- | --- | --- | --- | --- |
| [SMS Delivery Failures to Tigo Senegal Handsets](https://rewindex.com/company/twilio/incidents/fcvsxykwj3hd.md) | critical | 2019-09-07 00:56 UTC | 2019-09-07 07:19 UTC | 6.4 h | resolved |
| [Errors Accessing Twilio Customer Support Systems](https://rewindex.com/company/twilio/incidents/tzpcr7dq4rsx.md) | critical | 2019-09-16 18:45 UTC | 2019-09-16 20:32 UTC | 1.8 h | resolved |
| [Studio API returning HTTP 500 errors](https://rewindex.com/company/twilio/incidents/w2nfdgjvfr2b.md) | major | 2019-09-03 10:46 UTC | 2019-09-03 11:38 UTC | 52 min | resolved |

## All incidents

| Incident | Impact (vendor label) | Started (UTC) | Resolved (UTC) | Duration | Status |
| --- | --- | --- | --- | --- | --- |
| [SMS delivery degradation towards Orange, Egypt](https://rewindex.com/company/twilio/incidents/2wlq4d0qs3p8.md) | minor | 2019-09-02 11:43 UTC | 2019-09-02 12:49 UTC | 1.1 h | resolved |
| [Studio API returning HTTP 500 errors](https://rewindex.com/company/twilio/incidents/w2nfdgjvfr2b.md) | major | 2019-09-03 10:46 UTC | 2019-09-03 11:38 UTC | 52 min | resolved |
| [Message status callbacks delays](https://rewindex.com/company/twilio/incidents/m6bqx9ymz00x.md) | minor | 2019-09-03 17:43 UTC | 2019-09-03 18:31 UTC | 48 min | resolved |
| [SMS delivery degradation towards GrameenPhone, Bangladesh](https://rewindex.com/company/twilio/incidents/byzvfmlbdz5c.md) | minor | 2019-09-04 08:45 UTC | 2019-09-04 11:13 UTC | 2.5 h | resolved |
| [SMS delivery degradation towards Irancell, Iran](https://rewindex.com/company/twilio/incidents/khfs34z1gm36.md) | minor | 2019-09-04 11:26 UTC | 2019-09-04 14:20 UTC | 2.9 h | resolved |
| [SMS delivery degradation towards AT&T, Mexico](https://rewindex.com/company/twilio/incidents/2brsc6k81vgq.md) | minor | 2019-09-05 06:26 UTC | 2019-09-05 09:36 UTC | 3.2 h | resolved |
| [Retroactive: SMS delivery degradation for a subset of US shortcodes](https://rewindex.com/company/twilio/incidents/n5h5cxm5q97g.md) | none | 2019-09-05 15:37 UTC | 2019-09-05 15:37 UTC | 0 min | resolved |
| [Programmable Wireless connectivity issues in Chile](https://rewindex.com/company/twilio/incidents/r83s5g15zklb.md) | minor | 2019-09-05 18:17 UTC | 2019-09-05 23:57 UTC | 5.7 h | resolved |
| [SMS delivery degradation towards Claro, Brazil](https://rewindex.com/company/twilio/incidents/pkfl008xh93b.md) | minor | 2019-09-06 04:40 UTC | 2019-09-06 20:04 UTC | 15 h | resolved |
| [SMS Delivery Failures to Tigo Senegal Handsets](https://rewindex.com/company/twilio/incidents/fcvsxykwj3hd.md) | critical | 2019-09-07 00:56 UTC | 2019-09-07 07:19 UTC | 6.4 h | resolved |
| [SMS delivery delays from US Cellular handsets to a subset of shortcodes in the US](https://rewindex.com/company/twilio/incidents/37mk263j8mlq.md) | minor | 2019-09-07 15:48 UTC | 2019-09-07 17:35 UTC | 1.8 h | resolved |
| [Verify v2 API experienced elevated 500s](https://rewindex.com/company/twilio/incidents/jq2xntt3015v.md) | none | 2019-09-08 17:23 UTC | 2019-09-08 17:23 UTC | 0 min | resolved |
| [US Short Code SMS delays towards T-Mobile & MetroPCS](https://rewindex.com/company/twilio/incidents/twxbw50nb2cf.md) | none | 2019-09-09 10:17 UTC | 2019-09-09 10:17 UTC | 0 min | resolved |
| [SMS Delivery Degradation to Bragg Canada Mobile Devices](https://rewindex.com/company/twilio/incidents/4zj2qwmglp57.md) | minor | 2019-09-09 16:25 UTC | 2019-09-09 20:24 UTC | 4.0 h | resolved |
| [Delay in processing SIP trunking call logs](https://rewindex.com/company/twilio/incidents/pv94bcjz8kt5.md) | minor | 2019-09-09 19:20 UTC | 2019-09-09 19:47 UTC | 27 min | resolved |
| [SMS delivery degradation towards XL, Indonesia](https://rewindex.com/company/twilio/incidents/657pxp00gbz1.md) | minor | 2019-09-10 04:17 UTC | 2019-09-10 06:01 UTC | 1.7 h | resolved |
| [SMS delivery degradation towards Free Mobile, Canada](https://rewindex.com/company/twilio/incidents/55k4mgvw6tky.md) | minor | 2019-09-11 04:50 UTC | 2019-09-11 05:51 UTC | 1.0 h | resolved |
| [US Toll-Free SMS Delivery Degradation](https://rewindex.com/company/twilio/incidents/j6dph779bq47.md) | minor | 2019-09-11 05:55 UTC | 2019-09-11 06:50 UTC | 55 min | resolved |
| [Short Code SMS delivery degradation towards subset of US regional carriers](https://rewindex.com/company/twilio/incidents/6j37lymxp1gw.md) | minor | 2019-09-13 05:27 UTC | 2019-09-13 08:32 UTC | 3.1 h | resolved |
| [Inbound calls failing to subset of Brazil phone numbers](https://rewindex.com/company/twilio/incidents/mh2kp2pdkdz9.md) | minor | 2019-09-13 09:09 UTC | 2019-09-13 14:01 UTC | 4.9 h | resolved |
| [Unable to file support tickets](https://rewindex.com/company/twilio/incidents/7wpj2sjpz1sp.md) | minor | 2019-09-13 16:54 UTC | 2019-09-13 19:21 UTC | 2.5 h | resolved |
| [SMS delivery degradation towards NRJ Mobile Network, France](https://rewindex.com/company/twilio/incidents/nc5frdxfx0rp.md) | minor | 2019-09-15 20:54 UTC | 2019-09-16 09:36 UTC | 13 h | resolved |
| [Errors Accessing Twilio Customer Support Systems](https://rewindex.com/company/twilio/incidents/tzpcr7dq4rsx.md) | critical | 2019-09-16 18:45 UTC | 2019-09-16 20:32 UTC | 1.8 h | resolved |
| [Elevated level of errors accessing Usage records](https://rewindex.com/company/twilio/incidents/pky0s0r9v3cg.md) | minor | 2019-09-16 19:21 UTC | 2019-09-16 19:39 UTC | 18 min | resolved |
| [Issue with Credit Cards Processing](https://rewindex.com/company/twilio/incidents/bt7j9pmkqtvj.md) | minor | 2019-09-16 23:11 UTC | 2019-09-17 09:35 UTC | 10 h | resolved |
| [Elevated Errors for Authy Verify API](https://rewindex.com/company/twilio/incidents/jgbfq5vbpk43.md) | minor | 2019-09-17 18:48 UTC | 2019-09-17 19:30 UTC | 42 min | resolved |
| [SMS delivery degradation towards XL Indonesia Mobile Network](https://rewindex.com/company/twilio/incidents/42yxb9glp8p0.md) | minor | 2019-09-18 03:38 UTC | 2019-09-18 06:32 UTC | 2.9 h | resolved |
| [Calls failing to Twilio toll-free phone numbers in Brazil](https://rewindex.com/company/twilio/incidents/sdz0c8bghznk.md) | minor | 2019-09-18 10:17 UTC | 2019-09-18 14:51 UTC | 4.6 h | resolved |
| [Calls failing to Twilio toll-free phone numbers in Brazil](https://rewindex.com/company/twilio/incidents/t4fmnsvc31k8.md) | minor | 2019-09-19 12:21 UTC | 2019-09-19 14:05 UTC | 1.7 h | resolved |
| [Intermittent push notification failures for iOS Voice SDK](https://rewindex.com/company/twilio/incidents/bnhvtvrd193b.md) | minor | 2019-09-19 16:58 UTC | 2019-09-19 18:38 UTC | 1.7 h | resolved |
| [SMS Delivery Issues to Claro in Argentina](https://rewindex.com/company/twilio/incidents/j76tf12q48qb.md) | minor | 2019-09-20 05:42 UTC | 2019-09-20 08:00 UTC | 2.3 h | resolved |
| [SMS Delivery Issues to Beeline in Russia](https://rewindex.com/company/twilio/incidents/f71p54zts88w.md) | minor | 2019-09-20 06:14 UTC | 2019-09-20 18:00 UTC | 12 h | resolved |
| [Flex Insights (Flex WFO) dashboards are not operational](https://rewindex.com/company/twilio/incidents/jfc0rwxlz5bj.md) | minor | 2019-09-20 11:14 UTC | 2019-09-20 14:57 UTC | 3.7 h | resolved |
| [SMS Delivery Issues to Claro in Brazil](https://rewindex.com/company/twilio/incidents/2njbgwmb2j5w.md) | minor | 2019-09-20 14:30 UTC | 2019-09-20 22:33 UTC | 8.1 h | resolved |
| [Inbound call failures for a subset of Twilio toll-free and local numbers in APAC](https://rewindex.com/company/twilio/incidents/6pw0k0h97j50.md) | minor | 2019-09-23 09:31 UTC | 2019-09-25 10:10 UTC | 2 d | resolved |
| [SMS delivery degradation towards GrameenPhone, Bangladesh](https://rewindex.com/company/twilio/incidents/f4vysd30f9lb.md) | minor | 2019-09-23 10:17 UTC | 2019-09-23 11:44 UTC | 1.4 h | resolved |
| [Inbound calls failing to a subset of Twilio phone numbers in the US](https://rewindex.com/company/twilio/incidents/9k7mv8shrbn1.md) | none | 2019-09-25 15:46 UTC | 2019-09-25 22:34 UTC | 6.8 h | resolved |
| [SMS short code delivery degradation towards US Verizon](https://rewindex.com/company/twilio/incidents/fs84mdvk5cjh.md) | minor | 2019-09-25 19:44 UTC | 2019-09-25 22:34 UTC | 2.8 h | resolved |
| [SMS delivery degradation towards Kyivstar, Ukraine](https://rewindex.com/company/twilio/incidents/3nhcm03v4wx2.md) | minor | 2019-09-26 05:06 UTC | 2019-09-27 09:40 UTC | 29 h | resolved |
| [Toll-Free SMS delivery degradation towards Verizon and T-Mobile, USA](https://rewindex.com/company/twilio/incidents/p3fsx5csl9g9.md) | minor | 2019-09-26 07:52 UTC | 2019-09-26 10:06 UTC | 2.2 h | resolved |
| [SMS delivery degradation to Turkey Avea handsets](https://rewindex.com/company/twilio/incidents/0jwzc3b9t5pb.md) | minor | 2019-09-26 14:36 UTC | 2019-09-26 20:36 UTC | 6.0 h | resolved |
| [Errors when connecting new accounts with Twilio Connect.](https://rewindex.com/company/twilio/incidents/l6jclwspfgx4.md) | minor | 2019-09-27 15:56 UTC | 2019-09-27 18:30 UTC | 2.6 h | resolved |

## Maintenance

| Incident | Impact (vendor label) | Started (UTC) | Resolved (UTC) | Duration | Status |
| --- | --- | --- | --- | --- | --- |
| [\[Scheduled\] US Shortcode SMS Carrier Maintenance Towards Sprint US](https://rewindex.com/company/twilio/incidents/z8421wn200vc.md) | maintenance | 2019-09-04 04:30 UTC | 2019-09-04 11:00 UTC | 6.5 h | resolved |
| [\[Scheduled\] Change to "address" parameter in Phone Number Provisioning API](https://rewindex.com/company/twilio/incidents/y08pvvlfzsn0.md) | maintenance | 2019-09-04 13:00 UTC | 2019-09-04 16:00 UTC | 3.0 h | resolved |
| [\[Scheduled\] US Shortcode SMS Carrier Maintenance Towards Sprint US](https://rewindex.com/company/twilio/incidents/9jst2j9m63vb.md) | maintenance | 2019-09-05 04:12 UTC | 2019-09-05 11:12 UTC | 7.0 h | resolved |
| [\[Scheduled\] AT&T US SMS Carrier Maintenance](https://rewindex.com/company/twilio/incidents/g1cg3m6fcvpt.md) | maintenance | 2019-09-05 05:12 UTC | 2019-09-05 11:02 UTC | 5.8 h | resolved |
| [\[Scheduled\] AT&T US SMS Emergency Maintenance 5 Sept 2019](https://rewindex.com/company/twilio/incidents/czb4qf1xw157.md) | maintenance | 2019-09-06 02:00 UTC | 2019-09-06 11:00 UTC | 9.0 h | resolved |
| [\[Scheduled\] Sprint US SMS Carrier Maintenance](https://rewindex.com/company/twilio/incidents/cr1fl9mrwkjy.md) | maintenance | 2019-09-06 04:01 UTC | 2019-09-06 10:00 UTC | 6.0 h | resolved |
| [\[Scheduled\] Tele2 Russia - SMS Carrier Maintenance - 10 September 2019 14:00 - 18:00 PDT](https://rewindex.com/company/twilio/incidents/3zsfpvkptr7x.md) | maintenance | 2019-09-10 21:00 UTC | 2019-09-11 01:00 UTC | 4.0 h | resolved |
| [\[Scheduled\] US/Canada Toll-Free SMS/MMS carrier partner scheduled maintenance Sep 11 22:00 - Sep 12 00:00 PDT](https://rewindex.com/company/twilio/incidents/h3z3dzclg0wm.md) | maintenance | 2019-09-12 05:00 UTC | 2019-09-12 07:00 UTC | 2.0 h | resolved |
| [\[Scheduled\] Tele2 Russia- - SMS Carrier Maintenance - 12 September 2019 14:00 to 22:00 PDT](https://rewindex.com/company/twilio/incidents/4scxvtnn7b27.md) | maintenance | 2019-09-12 21:00 UTC | 2019-09-13 05:00 UTC | 8.0 h | resolved |
| [\[Scheduled\] AT&T US SMS Carrier Maintenance 17 Sept 2019](https://rewindex.com/company/twilio/incidents/6vstvzv2s82j.md) | maintenance | 2019-09-18 02:00 UTC | 2019-09-18 11:00 UTC | 9.0 h | resolved |
| [\[Scheduled\] Sprint US SMS Carrier Maintenance](https://rewindex.com/company/twilio/incidents/55w9833jsn07.md) | maintenance | 2019-09-18 19:42 UTC | 2019-09-18 20:00 UTC | 18 min | resolved |
| [\[Scheduled\] AT&T US SMS Carrier Maintenance 18 Sept 2019](https://rewindex.com/company/twilio/incidents/nqmn4r4m35b9.md) | maintenance | 2019-09-19 02:00 UTC | 2019-09-19 11:00 UTC | 9.0 h | resolved |
| [\[Scheduled\] US/Canada Toll-Free SMS/MMS carrier partner scheduled maintenance Sep 18 22:00 - Sep 19 00:00 PDT](https://rewindex.com/company/twilio/incidents/vscj2vzmylz5.md) | maintenance | 2019-09-19 05:00 UTC | 2019-09-19 07:00 UTC | 2.0 h | resolved |
| [\[Scheduled\] Twilio Voice, North America Toll-free Traffic Maintenance](https://rewindex.com/company/twilio/incidents/6vn7pmw7z83w.md) | maintenance | 2019-09-20 01:00 UTC | 2019-09-20 02:00 UTC | 1.0 h | resolved |
| [\[Scheduled\] Twilio Interconnect Ashburn, Virginia (US1) Emergency Maintenance](https://rewindex.com/company/twilio/incidents/93gm6ch9s2p9.md) | maintenance | 2019-09-22 04:01 UTC | 2019-09-22 08:01 UTC | 4.0 h | resolved |
| [\[Scheduled\] US Cellular - SMS Carrier Maintenance - SMS Carrier Maintenance 22 September 2019 23:00 - 23 September 2019 02:00 PDT](https://rewindex.com/company/twilio/incidents/8tp3dhr7rwnf.md) | maintenance | 2019-09-23 06:00 UTC | 2019-09-23 09:00 UTC | 3.0 h | resolved |
| [\[Scheduled\] Megafon Russia - SMS Carrier Maintenance - 24 September 2019 18:00 PDT - 24 September 2019 21:00 PDT](https://rewindex.com/company/twilio/incidents/bm0xkwh7ch4l.md) | maintenance | 2019-09-25 01:00 UTC | 2019-09-25 04:01 UTC | 3.0 h | resolved |
| [\[Scheduled\] AT&T Mexico - SMS Carrier Maintenance 24 Sep 2019 22:00 PDT - 24 Sep 2019 23:00 PDT](https://rewindex.com/company/twilio/incidents/rchzc055n65b.md) | maintenance | 2019-09-25 05:00 UTC | 2019-09-25 06:00 UTC | 1.0 h | resolved |
| [\[Scheduled\] T-Mobile US - SMS Carrier Maintenance 25 Sept 2019 20:00 PDT - 26 Sept 2019 00:00 PDT](https://rewindex.com/company/twilio/incidents/pm93dz3s6dnh.md) | maintenance | 2019-09-26 03:01 UTC | 2019-09-26 07:01 UTC | 4.0 h | resolved |
| [\[Scheduled\] US/Canada Toll-Free SMS/MMS carrier partner scheduled maintenance Sep 25 22:00 - Sep 26 00:00 PDT](https://rewindex.com/company/twilio/incidents/81c659cx21jn.md) | maintenance | 2019-09-26 05:00 UTC | 2019-09-26 07:00 UTC | 2.0 h | resolved |
| [\[Scheduled\] T-Mobile SMS Carrier Maintenance](https://rewindex.com/company/twilio/incidents/qg6s7ywkbcl3.md) | maintenance | 2019-09-30 06:00 UTC | 2019-09-30 10:00 UTC | 4.0 h | resolved |

## Cite this

Twilio posted 42 status incidents in September 2019 (3 major or critical); 0 price changes and 0 notable page changes observed.

- Canonical URL: https://rewindex.com/company/twilio/2019/09
- Citation: Twilio, “Twilio in September 2019” (2019-09-01 00:00 UTC). Archived by Rewindex: https://rewindex.com/company/twilio/2019/09 (CC BY 4.0).
- Markdown link: `[Twilio: Twilio in September 2019 (2019-09-01)](https://rewindex.com/company/twilio/2019/09)`


---
Canonical: https://rewindex.com/company/twilio/2019/09 · Markdown: https://rewindex.com/company/twilio/2019/09.md · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-05T14:56:04.523Z