# Twilio in January 2020: incidents, uptime and changes

> Twilio in January 2020: 45 incidents on its status page (4 major or critical), 99.61% 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/2020/01
Last updated: 2020-02-01T02:33:00Z

- Incidents posted: 45 (major/critical: 4) · Maintenance: 19
- By vendor impact label: critical 2, major 2, minor 38, none 3
- Uptime (vendor-reported): 99.61% free of major/critical incidents, 66.19% free of any incident; outage time 2 h 52 min, incident time 10.5 days
- Price changes: 0 · Pricing/legal/trust page changes: 0 · Deprecations: 0 · CVEs: 0
- Previous month: [December 2019](https://rewindex.com/company/twilio/2019/12.md) · Next: [February 2020](https://rewindex.com/company/twilio/2020/02.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 delays to and from toll free numbers and all US networks](https://rewindex.com/company/twilio/incidents/d46z6pkgqdz6.md) | critical | 2020-01-20 19:33 UTC | 2020-01-20 21:09 UTC | 1.6 h | resolved |
| [SMS delays to and from US toll free numbers](https://rewindex.com/company/twilio/incidents/tlykch5jzfmh.md) | critical | 2020-01-23 17:24 UTC | 2020-01-23 17:48 UTC | 24 min | resolved |
| [Debugger Alert Triggers are not Firing](https://rewindex.com/company/twilio/incidents/kqr3xjp5ql83.md) | major | 2020-01-10 23:31 UTC | 2020-01-11 00:09 UTC | 38 min | resolved |
| [500s returned when navigating to /authy and /phone-verification](https://rewindex.com/company/twilio/incidents/dgwwh5fxfqr8.md) | major | 2020-01-28 18:27 UTC | 2020-01-28 18:41 UTC | 14 min | resolved |

## All incidents

| Incident | Impact (vendor label) | Started (UTC) | Resolved (UTC) | Duration | Status |
| --- | --- | --- | --- | --- | --- |
| [Elastic SIP Trunking failure](https://rewindex.com/company/twilio/incidents/khvdrrrv5svr.md) | none | 2020-01-02 14:53 UTC | 2020-01-02 14:53 UTC | 0 min | resolved |
| [Pricing and Phone Numbers API returning HTTP 500 errors](https://rewindex.com/company/twilio/incidents/wkw32gn1nkhf.md) | minor | 2020-01-02 23:11 UTC | 2020-01-03 02:43 UTC | 3.5 h | resolved |
| [Pricing and Phone Numbers API returning HTTP 500 errors](https://rewindex.com/company/twilio/incidents/l93vwq11xz7c.md) | minor | 2020-01-03 16:38 UTC | 2020-01-03 20:31 UTC | 3.9 h | resolved |
| [SMS Delivery Degradation Towards Ufone Pakistan](https://rewindex.com/company/twilio/incidents/vkyh6sxqtdv6.md) | minor | 2020-01-07 01:52 UTC | 2020-01-07 03:22 UTC | 1.5 h | resolved |
| [SMS Delivery Degradation towards Smart Philippines](https://rewindex.com/company/twilio/incidents/ly3jm7n4yt28.md) | minor | 2020-01-07 20:40 UTC | 2020-01-08 01:00 UTC | 4.3 h | resolved |
| [Some email address fail to validate](https://rewindex.com/company/twilio/incidents/ppq7j1qw3ry4.md) | minor | 2020-01-08 03:18 UTC | 2020-01-08 05:52 UTC | 2.6 h | resolved |
| [Message delivery delays from Toll-free numbers to US Verizon](https://rewindex.com/company/twilio/incidents/t8t8q11rgsy1.md) | minor | 2020-01-08 15:08 UTC | 2020-01-08 15:22 UTC | 14 min | resolved |
| [SMS Short Code Delivery Degradation To and From Cellular South and Google Voice in USA](https://rewindex.com/company/twilio/incidents/40wt5wf6h38f.md) | minor | 2020-01-09 01:35 UTC | 2020-01-09 05:41 UTC | 4.1 h | resolved |
| [SMS Short Code Delivery Degradation towards T-Mobile in the United States](https://rewindex.com/company/twilio/incidents/q0vzx60k2231.md) | minor | 2020-01-09 20:04 UTC | 2020-01-09 20:47 UTC | 43 min | resolved |
| [SMS delivery degradation to and from Vodafone (505-003), Australia](https://rewindex.com/company/twilio/incidents/68b505wvnvjq.md) | minor | 2020-01-10 07:14 UTC | 2020-01-10 09:45 UTC | 2.5 h | resolved |
| [Subset of Phone Numbers Unavailable for Purchase](https://rewindex.com/company/twilio/incidents/yl096lfz22hg.md) | minor | 2020-01-10 17:34 UTC | 2020-01-10 22:45 UTC | 5.2 h | resolved |
| [Toll-Free SMS Delivery Delays towards AT&T in the US](https://rewindex.com/company/twilio/incidents/t1fg8zwywq61.md) | minor | 2020-01-10 23:21 UTC | 2020-01-14 05:10 UTC | 3 d | resolved |
| [Debugger Alert Triggers are not Firing](https://rewindex.com/company/twilio/incidents/kqr3xjp5ql83.md) | major | 2020-01-10 23:31 UTC | 2020-01-11 00:09 UTC | 38 min | resolved |
| [Inbound Voice Issues for Singapore Numbers](https://rewindex.com/company/twilio/incidents/j9xx9yw6ff3c.md) | minor | 2020-01-11 12:09 UTC | 2020-01-11 16:49 UTC | 4.7 h | resolved |
| [Delivery Receipt Delays for SMS from a Subset of US Short Codes towards US Cellular in the USA](https://rewindex.com/company/twilio/incidents/f6zq0v609dgt.md) | minor | 2020-01-11 18:00 UTC | 2020-01-11 19:26 UTC | 1.4 h | resolved |
| [Long Code SMS Delivery Delays to and from Networks in the United States and Canada](https://rewindex.com/company/twilio/incidents/s5m85jfrkm19.md) | minor | 2020-01-12 01:11 UTC | 2020-01-12 17:33 UTC | 16 h | resolved |
| [Outbound Conference and Flex calls are degraded](https://rewindex.com/company/twilio/incidents/jssjyjn6hp0x.md) | minor | 2020-01-14 01:54 UTC | 2020-01-14 04:06 UTC | 2.2 h | resolved |
| [Customers Redirected When Accessing Support](https://rewindex.com/company/twilio/incidents/rvg56xg6fym9.md) | minor | 2020-01-15 12:53 UTC | 2020-01-15 14:11 UTC | 1.3 h | resolved |
| [Conference rejecting participants requests to join](https://rewindex.com/company/twilio/incidents/v8g8jywkg6fw.md) | minor | 2020-01-15 19:18 UTC | 2020-01-15 20:14 UTC | 56 min | resolved |
| [Flex Users unable to receive Voice calls](https://rewindex.com/company/twilio/incidents/mhy4rr5bdpsn.md) | minor | 2020-01-15 22:17 UTC | 2020-01-16 01:46 UTC | 3.5 h | resolved |
| [Failure to create Tasks in TaskRouter](https://rewindex.com/company/twilio/incidents/r3pk3tb52573.md) | minor | 2020-01-15 23:23 UTC | 2020-01-16 00:20 UTC | 57 min | resolved |
| [SMS Delivery Delays to Networks in Australia](https://rewindex.com/company/twilio/incidents/pjjbgkk8rjc0.md) | minor | 2020-01-16 03:47 UTC | 2020-01-16 04:49 UTC | 1.0 h | resolved |
| [SMS delivery delays and non-deliveries to Multiple MTN Networks across African countries](https://rewindex.com/company/twilio/incidents/jqcrb3y4rq58.md) | minor | 2020-01-16 14:29 UTC | 2020-01-19 20:20 UTC | 3 d | resolved |
| [Toll-Free SMS Delivery Delays in the US](https://rewindex.com/company/twilio/incidents/4qwk44cxpwzx.md) | minor | 2020-01-16 18:37 UTC | 2020-01-16 19:51 UTC | 1.2 h | resolved |
| [Inbound Call Failures to Phone Numbers in Sweden](https://rewindex.com/company/twilio/incidents/47qwbcf12xlb.md) | minor | 2020-01-17 09:14 UTC | 2020-01-17 10:05 UTC | 51 min | resolved |
| [SMS delivery delays and non-deliveries to Multiple MTN Networks across African countries](https://rewindex.com/company/twilio/incidents/1g9ff3x2yg4n.md) | minor | 2020-01-19 22:24 UTC | 2020-01-20 01:59 UTC | 3.6 h | resolved |
| [SMS delivery degradation towards Indosat, Indonesia](https://rewindex.com/company/twilio/incidents/zx1bqkd5wcp5.md) | minor | 2020-01-20 04:57 UTC | 2020-01-20 13:51 UTC | 8.9 h | resolved |
| [SMS delivery delays to and from toll free numbers and all US networks](https://rewindex.com/company/twilio/incidents/d46z6pkgqdz6.md) | critical | 2020-01-20 19:33 UTC | 2020-01-20 21:09 UTC | 1.6 h | resolved |
| [SMS delivery delays to and from the O2 network in Germany](https://rewindex.com/company/twilio/incidents/zjrqv08jkzw7.md) | minor | 2020-01-21 08:05 UTC | 2020-01-21 11:02 UTC | 3.0 h | resolved |
| [SMS delivery delays to Bouygues network in France.](https://rewindex.com/company/twilio/incidents/366srzvc0vf7.md) | minor | 2020-01-21 11:39 UTC | 2020-01-21 13:46 UTC | 2.1 h | resolved |
| [SMS Not delivered to Banglalink Digital network in Bangladesh.](https://rewindex.com/company/twilio/incidents/nchs96bvxnqt.md) | minor | 2020-01-21 14:49 UTC | 2020-01-21 15:41 UTC | 52 min | resolved |
| [Some Requests To Initiate Outbound Calls via API Are Failing](https://rewindex.com/company/twilio/incidents/wgzg557463v0.md) | minor | 2020-01-22 07:28 UTC | 2020-01-22 08:29 UTC | 1.0 h | resolved |
| [On Call Engineers are Investigating](https://rewindex.com/company/twilio/incidents/05g6r3v92w5x.md) | none | 2020-01-22 23:01 UTC | 2020-01-22 23:44 UTC | 43 min | resolved |
| [SMS delivery delays to Vivo network in Brazil.](https://rewindex.com/company/twilio/incidents/cvf2sk1208y4.md) | minor | 2020-01-23 03:41 UTC | 2020-01-23 15:34 UTC | 12 h | resolved |
| [SMS Delivery Degradation Towards Movistar in Venezuela](https://rewindex.com/company/twilio/incidents/36zygtq7kh6q.md) | minor | 2020-01-23 05:54 UTC | 2020-01-23 09:35 UTC | 3.7 h | resolved |
| [SMS non-delivery to Glo Mobile in Nigeria](https://rewindex.com/company/twilio/incidents/8khjnwt9lhz5.md) | minor | 2020-01-23 17:01 UTC | 2020-01-23 18:08 UTC | 1.1 h | resolved |
| [SMS delays to and from US toll free numbers](https://rewindex.com/company/twilio/incidents/tlykch5jzfmh.md) | critical | 2020-01-23 17:24 UTC | 2020-01-23 17:48 UTC | 24 min | resolved |
| [SMS non-delivery to Israel](https://rewindex.com/company/twilio/incidents/kj1vxly8lwvz.md) | minor | 2020-01-27 07:22 UTC | 2020-01-27 08:16 UTC | 54 min | resolved |
| [Inbound Calls Failing to a subset of Netherlands phone numbers](https://rewindex.com/company/twilio/incidents/4s98wtw0sph8.md) | none | 2020-01-27 10:20 UTC | 2020-01-27 10:20 UTC | 0 min | resolved |
| [Voice transcriptions availability below SLA](https://rewindex.com/company/twilio/incidents/2mn5ly0hmd6g.md) | minor | 2020-01-27 18:18 UTC | 2020-01-27 19:33 UTC | 1.3 h | resolved |
| [500s returned when navigating to /authy and /phone-verification](https://rewindex.com/company/twilio/incidents/dgwwh5fxfqr8.md) | major | 2020-01-28 18:27 UTC | 2020-01-28 18:41 UTC | 14 min | resolved |
| [SMS traffic undelivered to Zain in Kuwait (419 02)](https://rewindex.com/company/twilio/incidents/y75j8dwydj0x.md) | minor | 2020-01-30 10:04 UTC | 2020-01-30 14:35 UTC | 4.5 h | resolved |
| [Delivery Degradation Toward Movilnet Venezuela](https://rewindex.com/company/twilio/incidents/wz6kljztr57m.md) | minor | 2020-01-31 02:17 UTC | 2020-01-31 08:01 UTC | 5.7 h | resolved |
| [SMS Service Unavailable Nigeria](https://rewindex.com/company/twilio/incidents/bv4z04f8xzx6.md) | minor | 2020-01-31 02:21 UTC | 2020-01-31 14:50 UTC | 12 h | resolved |
| [Some Inbound calls to numbers in Europe are resulting in duplicate call flows](https://rewindex.com/company/twilio/incidents/gj533ky9g2jy.md) | minor | 2020-01-31 16:59 UTC | 2020-02-01 02:33 UTC | 9.6 h | resolved |

## Maintenance

| Incident | Impact (vendor label) | Started (UTC) | Resolved (UTC) | Duration | Status |
| --- | --- | --- | --- | --- | --- |
| [\[Scheduled\] Orange France SMS Carrier Partner Maintenance](https://rewindex.com/company/twilio/incidents/vl32q1xfw2l6.md) | maintenance | 2020-01-07 08:00 UTC | 2020-01-07 18:00 UTC | 10 h | resolved |
| [\[Scheduled\] US Shortcode SMS Carrier Partner Maintenance](https://rewindex.com/company/twilio/incidents/jynjrhb4d5z3.md) | maintenance | 2020-01-08 14:00 UTC | 2020-01-08 17:00 UTC | 3.0 h | resolved |
| [\[Scheduled\] T-Mobile US SMS Carrier Maintenance - January 9, 21:00 - January 10, 03:00 PT](https://rewindex.com/company/twilio/incidents/7c3t50j39h7t.md) | maintenance | 2020-01-10 07:37 UTC | 2020-01-10 11:00 UTC | 3.4 h | resolved |
| [\[Scheduled\] Sprint US SMS Carrier Maintenance](https://rewindex.com/company/twilio/incidents/pv8mq0n16hxy.md) | maintenance | 2020-01-12 01:00 UTC | 2020-01-12 16:00 UTC | 15 h | resolved |
| [\[Scheduled\] Sprint US SMS Carrier Maintenance - January 11, 17:00 PT - January 12, 20:00 PT](https://rewindex.com/company/twilio/incidents/s1qnjml7vwt0.md) | maintenance | 2020-01-13 00:45 UTC | 2020-01-13 04:00 UTC | 3.3 h | resolved |
| [\[Scheduled\] T-Mobile US SMS Carrier Maintenance -  January 13, 00:00 - 03:00 PT](https://rewindex.com/company/twilio/incidents/v9kgk0k6mzq3.md) | maintenance | 2020-01-13 08:00 UTC | 2020-01-13 11:01 UTC | 3.0 h | resolved |
| [\[Scheduled\] AT&T US SMS Carrier Maintenance](https://rewindex.com/company/twilio/incidents/kmq57m1chcb1.md) | maintenance | 2020-01-15 02:01 UTC | 2020-01-15 12:00 UTC | 10.0 h | resolved |
| [\[Scheduled\] Change to BundleSID parameter in Phone Number Provisioning API](https://rewindex.com/company/twilio/incidents/h6lvd20pvgy2.md) | maintenance | 2020-01-15 14:00 UTC | 2020-01-15 17:00 UTC | 3.0 h | resolved |
| [\[Scheduled\] AT&T US SMS Carrier Maintenance](https://rewindex.com/company/twilio/incidents/vcrlfyg7r0r2.md) | maintenance | 2020-01-16 02:02 UTC | 2020-01-16 12:00 UTC | 10.0 h | resolved |
| [\[Scheduled\] Megafon Russia - SMS Carrier Maintenance - 20 January 2020 12:00 - 16:00 PST](https://rewindex.com/company/twilio/incidents/nhn04j2qzk7s.md) | maintenance | 2020-01-20 20:01 UTC | 2020-01-21 00:00 UTC | 4.0 h | resolved |
| [\[Scheduled\] Tele2 Russia - SMS Carrier Maintenance](https://rewindex.com/company/twilio/incidents/mb5mk011s7hg.md) | maintenance | 2020-01-21 21:00 UTC | 2020-01-22 01:00 UTC | 4.0 h | resolved |
| [\[Scheduled\] US Cellular SMS Carrier Maintenance](https://rewindex.com/company/twilio/incidents/v7vt3tcqm9wt.md) | maintenance | 2020-01-23 07:00 UTC | 2020-01-23 10:01 UTC | 3.0 h | resolved |
| [\[Scheduled\] Sprint US SMS Carrier Maintenance](https://rewindex.com/company/twilio/incidents/ldrnt2r4l8p7.md) | maintenance | 2020-01-23 07:00 UTC | 2020-01-23 11:00 UTC | 4.0 h | resolved |
| [\[Scheduled\] T-Mobile US SMS Carrier Maintenance](https://rewindex.com/company/twilio/incidents/r2xynvmgn50f.md) | maintenance | 2020-01-23 08:01 UTC | 2020-01-23 11:00 UTC | 3.0 h | resolved |
| [\[Scheduled\] US Toll-Free SMS Carrier Partner Maintenance](https://rewindex.com/company/twilio/incidents/v1f5qsvq0v4n.md) | maintenance | 2020-01-24 05:00 UTC | 2020-01-24 07:00 UTC | 2.0 h | resolved |
| [\[Scheduled\] AT&T US SMS Carrier Maintenance](https://rewindex.com/company/twilio/incidents/l8qxh14htwxz.md) | maintenance | 2020-01-29 02:30 UTC | 2020-01-29 08:02 UTC | 5.5 h | resolved |
| [\[Scheduled\] AT&T US SMS Carrier Maintenance](https://rewindex.com/company/twilio/incidents/chmcvxt79ywj.md) | maintenance | 2020-01-30 02:30 UTC | 2020-01-30 08:01 UTC | 5.5 h | resolved |
| [\[Scheduled\] US Toll-Free SMS Carrier Partner Maintenance](https://rewindex.com/company/twilio/incidents/2mrkbvfvbjw5.md) | maintenance | 2020-01-30 05:00 UTC | 2020-01-30 08:01 UTC | 3.0 h | resolved |
| [\[Scheduled\] T-Mobile US SMS Carrier Maintenance](https://rewindex.com/company/twilio/incidents/v7srlvq9f3wf.md) | maintenance | 2020-01-30 08:01 UTC | 2020-01-30 11:00 UTC | 3.0 h | resolved |

## Cite this

Twilio posted 45 status incidents in January 2020 (4 major or critical); 0 price changes and 0 notable page changes observed.

- Canonical URL: https://rewindex.com/company/twilio/2020/01
- Citation: Twilio, “Twilio in January 2020” (2020-01-01 00:00 UTC). Archived by Rewindex: https://rewindex.com/company/twilio/2020/01 (CC BY 4.0).
- Markdown link: `[Twilio: Twilio in January 2020 (2020-01-01)](https://rewindex.com/company/twilio/2020/01)`


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Canonical: https://rewindex.com/company/twilio/2020/01 · Markdown: https://rewindex.com/company/twilio/2020/01.md · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T21:43:27.382Z