Resolved -
Following an amendment to Decree 4/2012 (I.24), calls made to Hungary using fixed or geographic numbers (like +36 1-9...) as a CLI are now likely to be blocked by local carriers, as of October 15, 2025. This will expand to mobile numbers (like +36 20, 30, 70...) starting June 1, 2026.
This means calls made with Transit Caller ID and Verified Caller ID will be delivered by Twilio on a best-effort basis when you're using a Hungarian CLI.
Recommended steps:
- For calls made into Hungary using Verified Caller ID or Transit Caller ID avoid using Hungarian numbers (+36 1-9… and +36 20, 30, 70...) as your CLI as the calls are likely to be blocked.
- If a Hungary CLI isn’t a priority for your use case, use a non-Hungarian CLI like your main business or international service number. If you need one, you can quickly get a United States (+1) number right in the Twilio Console to use for these calls.
If you observe abnormal failure patterns, please reach out to Twilio Support for further assistance.
Oct 30, 14:18 PDT
Update -
Our carrier partner has informed us that the Hungarian regulator NMHH has begun enforcing Decree 4/2012 (I.24.), which introduces new screening and blocking obligations for calls terminating in Hungary via international interconnection points that present Hungarian Caller IDs.
To avoid disruptions in call delivery to Hungarian destinations, we recommend the following actions:
Recommended Steps:
- Avoid using Hungarian CLIs (+36 numbers) as Caller IDs on calls into Hungary unless you have a valid domestic interconnection or roaming agreement to justify their use.
- Where possible, use non-Hungarian CLIs, such as your main business number or an international service number.
You can quickly provision U.S. numbers (+1) in the Twilio Console and use those for calls to Hungarian recipients.
- Monitor your call completion rates to Hungarian destinations.
If you observe abnormal failure patterns, please reach out to Twilio Support for further assistance.
We’ll provide another update in 24 hours or sooner as more information becomes available.
Oct 29, 23:06 PDT
Update -
Our carrier partner has informed us that the Hungarian regulator NMHH has begun enforcing Decree 4/2012 (I.24.), which introduces new screening and blocking obligations for calls terminating in Hungary via international interconnection points that present Hungarian Caller IDs.
To avoid disruptions in call delivery to Hungarian destinations, we recommend the following actions:
Recommended Steps:
- Avoid using Hungarian CLIs (+36 numbers) as Caller IDs on calls into Hungary unless you have a valid domestic interconnection or roaming agreement to justify their use.
- Where possible, use non-Hungarian CLIs, such as your main business number or an international service number.
You can quickly provision U.S. numbers (+1) in the Twilio Console and use those for calls to Hungarian recipients.
- Monitor your call completion rates to Hungarian destinations.
If you observe abnormal failure patterns, please reach out to Twilio Support for further assistance.
We’ll provide another update in 24 hours or sooner as more information becomes available.
Oct 28, 22:45 PDT
Update -
Our carrier partner has informed us that the Hungarian regulator NMHH has begun enforcing Decree 4/2012 (I.24.), which introduces new screening and blocking obligations for calls terminating in Hungary via international interconnection points that present Hungarian Caller IDs.
To avoid disruptions in call delivery to Hungarian destinations, we recommend the following actions:
Recommended Steps:
- Avoid using Hungarian CLIs (+36 numbers) as Caller IDs on calls into Hungary unless you have a valid domestic interconnection or roaming agreement to justify their use.
- Where possible, use non-Hungarian CLIs, such as your main business number or an international service number.
You can quickly provision U.S. numbers (+1) in the Twilio Console and use those for calls to Hungarian recipients.
- Monitor your call completion rates to Hungarian destinations.
If you observe abnormal failure patterns, please reach out to Twilio Support for further assistance.
We’ll provide another update in 24 hours or sooner as more information becomes available.
Oct 27, 22:37 PDT
Update -
Our carrier partner has informed us that the Hungarian regulator NMHH has begun enforcing Decree 4/2012 (I.24.), which introduces new screening and blocking obligations for calls terminating in Hungary via international interconnection points that present Hungarian Caller IDs.
To avoid disruptions in call delivery to Hungarian destinations, we recommend the following actions:
Recommended Steps:
- Avoid using Hungarian CLIs (+36 numbers) as Caller IDs on calls into Hungary unless you have a valid domestic interconnection or roaming agreement to justify their use.
- Where possible, use non-Hungarian CLIs, such as your main business number or an international service number.
You can quickly provision U.S. numbers (+1) in the Twilio Console and use those for calls to Hungarian recipients.
- Monitor your call completion rates to Hungarian destinations.
If you observe abnormal failure patterns, please reach out to Twilio Support for further assistance.
We’ll provide another update in 24 hours or sooner as more information becomes available.
Oct 26, 22:40 PDT
Update -
Our carrier partner has informed us that the Hungarian regulator NMHH has begun enforcing Decree 4/2012 (I.24.), which introduces new screening and blocking obligations for calls terminating in Hungary via international interconnection points that present Hungarian Caller IDs.
To avoid disruptions in call delivery to Hungarian destinations, we recommend the following actions:
Recommended Steps:
- Avoid using Hungarian CLIs (+36 numbers) as Caller IDs on calls into Hungary unless you have a valid domestic interconnection or roaming agreement to justify their use.
- Where possible, use non-Hungarian CLIs, such as your main business number or an international service number.
You can quickly provision U.S. numbers (+1) in the Twilio Console and use those for calls to Hungarian recipients.
- Monitor your call completion rates to Hungarian destinations.
If you observe abnormal failure patterns, please reach out to Twilio Support for further assistance.
We’ll provide another update in 24 hours or sooner as more information becomes available.
Oct 25, 22:40 PDT
Update -
Our carrier partner has informed us that the Hungarian regulator NMHH has begun enforcing Decree 4/2012 (I.24.), which introduces new screening and blocking obligations for calls terminating in Hungary via international interconnection points that present Hungarian Caller IDs.
To avoid disruptions in call delivery to Hungarian destinations, we recommend the following actions:
Recommended Steps:
- Avoid using Hungarian CLIs (+36 numbers) as Caller IDs on calls into Hungary unless you have a valid domestic interconnection or roaming agreement to justify their use.
- Where possible, use non-Hungarian CLIs, such as your main business number or an international service number.
You can quickly provision U.S. numbers (+1) in the Twilio Console and use those for calls to Hungarian recipients.
- Monitor your call completion rates to Hungarian destinations.
If you observe abnormal failure patterns, please reach out to Twilio Support for further assistance.
We’ll provide another update in 24 hours or sooner as more information becomes available.
Oct 24, 22:31 PDT
Update -
Our carrier partner has informed us that the Hungarian regulator NMHH has begun enforcing Decree 4/2012 (I.24.), which introduces new screening and blocking obligations for calls terminating in Hungary via international interconnection points that present Hungarian Caller IDs.
To avoid disruptions in call delivery to Hungarian destinations, we recommend the following actions:
Recommended Steps:
- Avoid using Hungarian CLIs (+36 numbers) as Caller IDs on calls into Hungary unless you have a valid domestic interconnection or roaming agreement to justify their use.
- Where possible, use non-Hungarian CLIs, such as your main business number or an international service number.
You can quickly provision U.S. numbers (+1) in the Twilio Console and use those for calls to Hungarian recipients.
- Monitor your call completion rates to Hungarian destinations.
If you observe abnormal failure patterns, please reach out to Twilio Support for further assistance.
We’ll provide another update in 24 hours or sooner as more information becomes available.
Oct 23, 22:31 PDT
Update -
Our carrier partner has informed us that the Hungarian regulator NMHH has begun enforcing Decree 4/2012 (I.24.), which introduces new screening and blocking obligations for calls terminating in Hungary via international interconnection points that present Hungarian Caller IDs.
To avoid disruptions in call delivery to Hungarian destinations, we recommend the following actions:
Recommended Steps:
- Avoid using Hungarian CLIs (+36 numbers) as Caller IDs on calls into Hungary unless you have a valid domestic interconnection or roaming agreement to justify their use.
- Where possible, use non-Hungarian CLIs, such as your main business number or an international service number.
You can quickly provision U.S. numbers (+1) in the Twilio Console and use those for calls to Hungarian recipients.
- Monitor your call completion rates to Hungarian destinations.
If you observe abnormal failure patterns, please reach out to Twilio Support for further assistance.
We’ll provide another update in 24 hours or sooner as more information becomes available.
Oct 22, 22:31 PDT
Update -
Our carrier partner has informed us that the Hungarian regulator NMHH has begun enforcing Decree 4/2012 (I.24.), which introduces new screening and blocking obligations for calls terminating in Hungary via international interconnection points that present Hungarian Caller IDs.
To avoid disruptions in call delivery to Hungarian destinations, we recommend the following actions:
Recommended Steps:
- Avoid using Hungarian CLIs (+36 numbers) as Caller IDs on calls into Hungary unless you have a valid domestic interconnection or roaming agreement to justify their use.
- Where possible, use non-Hungarian CLIs, such as your main business number or an international service number.
You can quickly provision U.S. numbers (+1) in the Twilio Console and use those for calls to Hungarian recipients.
- Monitor your call completion rates to Hungarian destinations.
If you observe abnormal failure patterns, please reach out to Twilio Support for further assistance.
We’ll provide another update in 24 hours or sooner as more information becomes available.
Oct 21, 22:32 PDT
Update -
Our carrier partner has informed us that the Hungarian regulator NMHH has begun enforcing Decree 4/2012 (I.24.), which introduces new screening and blocking obligations for calls terminating in Hungary via international interconnection points that present Hungarian Caller IDs.
To avoid disruptions in call delivery to Hungarian destinations, we recommend the following actions:
Recommended Steps:
- Avoid using Hungarian CLIs (+36 numbers) as Caller IDs on calls into Hungary unless you have a valid domestic interconnection or roaming agreement to justify their use.
- Where possible, use non-Hungarian CLIs, such as your main business number or an international service number.
You can quickly provision U.S. numbers (+1) in the Twilio Console and use those for calls to Hungarian recipients.
- Monitor your call completion rates to Hungarian destinations.
If you observe abnormal failure patterns, please reach out to Twilio Support for further assistance.
We’ll provide another update in 24 hours or sooner as more information becomes available.
Oct 20, 22:39 PDT
Update -
Our carrier partner has informed us that the Hungarian regulator NMHH has begun enforcing Decree 4/2012 (I.24.), which introduces new screening and blocking obligations for calls terminating in Hungary via international interconnection points that present Hungarian Caller IDs.
To avoid disruptions in call delivery to Hungarian destinations, we recommend the following actions:
Recommended Steps:
- Avoid using Hungarian CLIs (+36 numbers) as Caller IDs on calls into Hungary unless you have a valid domestic interconnection or roaming agreement to justify their use.
- Where possible, use non-Hungarian CLIs, such as your main business number or an international service number.
You can quickly provision U.S. numbers (+1) in the Twilio Console and use those for calls to Hungarian recipients.
- Monitor your call completion rates to Hungarian destinations.
If you observe abnormal failure patterns, please reach out to Twilio Support for further assistance.
We’ll provide another update on 10/20/2025 at 12:00 PM PT or sooner as more information becomes available.
Oct 19, 22:35 PDT
Update -
Our carrier partner has informed us that the Hungarian regulator NMHH has begun enforcing Decree 4/2012 (I.24.), which introduces new screening and blocking obligations for calls terminating in Hungary via international interconnection points that present Hungarian Caller IDs.
To avoid disruptions in call delivery to Hungarian destinations, we recommend the following actions:
Recommended Steps:
- Avoid using Hungarian CLIs (+36 numbers) as Caller IDs on calls into Hungary unless you have a valid domestic interconnection or roaming agreement to justify their use.
- Where possible, use non-Hungarian CLIs, such as your main business number or an international service number.
You can quickly provision U.S. numbers (+1) in the Twilio Console and use those for calls to Hungarian recipients.
- Monitor your call completion rates to Hungarian destinations.
If you observe abnormal failure patterns, please reach out to Twilio Support for further assistance.
We’ll provide another update on 10/20/2025 at 12:00 PM PT or sooner as more information becomes available.
Oct 18, 22:34 PDT
Identified -
Our carrier partner has informed us that the Hungarian regulator NMHH has begun enforcing Decree 4/2012 (I.24.), which introduces new screening and blocking obligations for calls terminating in Hungary via international interconnection points that present Hungarian Caller IDs.
To avoid disruptions in call delivery to Hungarian destinations, we recommend the following actions:
Recommended Steps:
- Avoid using Hungarian CLIs (+36 numbers) as Caller IDs on calls into Hungary unless you have a valid domestic interconnection or roaming agreement to justify their use.
- Where possible, use non-Hungarian CLIs, such as your main business number or an international service number.
You can quickly provision U.S. numbers (+1) in the Twilio Console and use those for calls to Hungarian recipients.
- Monitor your call completion rates to Hungarian destinations.
If you observe abnormal failure patterns, please reach out to Twilio Support for further assistance.
We’ll provide another update on 10/20/2025 at 12:00 PM PT or sooner as more information becomes available.
Oct 16, 22:37 PDT
Update -
We continue to observe a subset of outbound call failures to Hungary phone numbers. We are currently working with our carrier partner to resolve the issue. We expect to provide another update in 24 hours or as soon as more information becomes available.
Oct 16, 14:39 PDT
Update -
We continue to observe a subset of outbound call failures to Hungary phone numbers. We are currently working with our carrier partner to resolve the issue. We expect to provide another update in 16 hours or as soon as more information becomes available.
Oct 15, 22:39 PDT
Update -
We continue to observe a subset of outbound call failures to Hungry phone numbers. We are currently working with our carrier partner to resolve the issue. We expect to provide another update in 8 hours or as soon as more information becomes available.
Oct 15, 14:34 PDT
Update -
We are observing a subset of outbound call failures to Hungry phone numbers. We are currently working with our carrier partner to resolve the issue. We expect to provide another update in 4 hours or as soon as more information becomes available.
Oct 15, 10:34 PDT
Update -
We are observing a subset of outbound call failures to Hungry phone numbers. We are currently working with our carrier partner to resolve the issue. We expect to provide another update in 2 hours or as soon as more information becomes available.
Oct 15, 08:33 PDT
Update -
We are observing a subset of outbound call failures to Hungry phone numbers. We are currently working with our carrier partner to resolve the issue. We expect to provide another update in 1 hour or as soon as more information becomes available.
Oct 15, 07:34 PDT
Investigating -
Our monitoring systems have detected a potential issue with calls failing to Hungry. Our engineering team has been alerted and is actively investigating. We will update as soon as we have more information.
Oct 15, 07:28 PDT