# Enable Verified Caller ID (Indian Airtel Number) for Outbound Calls **URL:** \ **Category:** Support Help\ **Tags:** telephony\ **Created:** [February 6, 2026, 8:42am UTC](https://community.retellai.com/t/enable-verified-caller-id-indian-airtel-number-for-outbound-calls/789 "2026-02-06T08:42:59Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![infosuzi6](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/infosuzi6/32/377_2.png) [@infosuzi6](https://community.retellai.com/u/infosuzi6)\ **Post date:** [February 6, 2026, 8:42am UTC](https://community.retellai.com/t/enable-verified-caller-id-indian-airtel-number-for-outbound-calls/789/1 "2026-02-06T08:42:59Z")
Hi Retell AI Team, I have already: • Created an agent • Added billing • Purchased an international phone number I want to use my own Indian Airtel mobile number (+91) as Caller ID for OUTGOING calls only. Use case: • Official, non-promotional healthcare coordination calls • No incoming calls required • No SIP trunking needed • OTP-based number verification is acceptable Currently, I do not see any option for: • BYON • Verified Caller ID • Add my own number Could you please confirm: 1. Is Indian mobile number Caller ID supported on my account? (Yes/No) 2. If yes, please enable BYON / Verified Caller ID for my account 3. If not supported, please confirm clearly so I can plan alternatives Thank you, Aditya Kumar India ---
**Author:** ![support2](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/support2/32/15_2.png) [@support2](https://community.retellai.com/u/support2)\ **Post date:** [February 6, 2026, 8:43am UTC](https://community.retellai.com/t/enable-verified-caller-id-indian-airtel-number-for-outbound-calls/789/2 "2026-02-06T08:43:23Z")
Using your own mobile number as caller ID for outbound calls requires integrating with Retell AI through custom telephony via SIP trunking[(1)](https://docs.retellai.com/deploy/custom-telephony). The platform supports importing phone numbers from custom telephony providers using the Import Phone Number API[(2)](https://docs.retellai.com/api-references/import-phone-number). To use your Indian Airtel mobile number as caller ID, you would need to work with a telephony provider that supports elastic SIP trunking[(1)](https://docs.retellai.com/deploy/custom-telephony). The process involves setting up a SIP trunk with your provider and configuring it to use your personal number as the outbound caller ID[(1)](https://docs.retellai.com/deploy/custom-telephony). For verified caller ID specifically, one documented approach involves verifying your personal number with a telephony provider like Telnyx, then setting it as a caller ID override in your SIP connection’s outbound settings[(3)](https://discord.com/channels/1186424376300679209/1400660575100604537). Calls routed through Retell’s SIP trunk using this configuration will display your personal number[(3)](https://discord.com/channels/1186424376300679209/1400660575100604537). The Import Phone Number API requires these parameters[(2)](https://docs.retellai.com/api-references/import-phone-number): - `phone_number` in E.164 format (e.g., “+914157774444” for an Indian number)[(2)](https://docs.retellai.com/api-references/import-phone-number) - `termination_uri` for your SIP trunk[(2)](https://docs.retellai.com/api-references/import-phone-number) - Optional `sip_trunk_auth_username` and `sip_trunk_auth_password`[(2)](https://docs.retellai.com/api-references/import-phone-number) Retell’s SIP server URI is `sip:sip.retellai.com` with IP block `18.98.16.120/30` for all regions[(1)](https://docs.retellai.com/deploy/custom-telephony). Transport methods supported include TCP (recommended), UDP, and TLS[(1)](https://docs.retellai.com/deploy/custom-telephony). I cannot confirm from the available documentation whether Indian mobile numbers are specifically supported or if BYON/Verified Caller ID features are enabled by default on your account. For account-specific feature enablement and India-specific telephony support, please contact: - [Contact Sales](https://retellai.octolane.com/) - [Discord](https://discord.com/invite/wxtjkjj2zp) - [GitHub](https://github.com/RetellAI/) ---
**Author:** ![Omar\_Ashraf](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/omar_ashraf/32/102_2.png) [@Omar\_Ashraf](https://community.retellai.com/u/Omar_Ashraf)\ **Post date:** [February 6, 2026, 4:40pm UTC](https://community.retellai.com/t/enable-verified-caller-id-indian-airtel-number-for-outbound-calls/789/3 "2026-02-06T16:40:28Z")
Hello @infosuzi6 If your phone number supports sip tunrking, then you can connect it Or you can use the dial to SIP method > **[​Method 2: Dial to SIP URI - Custom Telephony Overview - Retell AI](https://docs.retellai.com/deploy/custom-telephony#method-2-dial-to-sip-uri)** > > Will it throw errors if the details or configuration is incorrect? | A step by step guide to integrate custom telephony providers ---
**Author:** ![support2](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/support2/32/15_2.png) [@support2](https://community.retellai.com/u/support2)\ **Post date:** [February 6, 2026, 4:40pm UTC](https://community.retellai.com/t/enable-verified-caller-id-indian-airtel-number-for-outbound-calls/789/4 "2026-02-06T16:40:57Z")
* * * You’re correct—there are two primary methods to integrate custom telephony providers with Retell AI[(1)](https://docs.retellai.com/deploy/custom-telephony). **Method 1: Elastic SIP Trunking (Recommended)**[(1)](https://docs.retellai.com/deploy/custom-telephony) This is the recommended approach for integrating with telephony providers that support elastic SIP trunking[(1)](https://docs.retellai.com/deploy/custom-telephony). You’ll need to set up a SIP trunk and configure your number to point to it, then import that number to Retell[(1)](https://docs.retellai.com/deploy/custom-telephony). When using this method, all telephony functionalities supported by Retell numbers will also be supported here, assuming your telephony provider supports them[(1)](https://docs.retellai.com/deploy/custom-telephony). Retell’s SIP server URI is: `sip:sip.retellai.com`[(1)](https://docs.retellai.com/deploy/custom-telephony) IP block for traffic: `18.98.16.120/30` (All regions), `143.223.88.0/21` (certain United States traffic), `161.115.160.0/19` (certain United States traffic)[(1)](https://docs.retellai.com/deploy/custom-telephony) Transport methods supported include TCP (Recommended), UDP, and TLS[(1)](https://docs.retellai.com/deploy/custom-telephony). **Method 2: Dial to SIP URI** [(1)](https://docs.retellai.com/deploy/custom-telephony) If your telephony provider doesn’t support elastic SIP trunking, or you have a more complicated telephony setup, you can use this method[(1)](https://docs.retellai.com/deploy/custom-telephony). With this approach, Retell doesn’t directly make or receive calls—instead, your system dials the call to the respective SIP URI[(1)](https://docs.retellai.com/deploy/custom-telephony). This requires you to have code to handle integration with your telephony provider[(1)](https://docs.retellai.com/deploy/custom-telephony). To obtain the SIP URI for a call, you would call the Register Phone Call API[(1)](https://docs.retellai.com/deploy/custom-telephony). You’ll get a `call_id` back from this API, which you use to construct the SIP URI[(1)](https://docs.retellai.com/deploy/custom-telephony): SIP URI: `sip:{call_id}@sip.retellai.com`[(1)](https://docs.retellai.com/deploy/custom-telephony) When using this method, you won’t be able to utilize Retell’s transfer call feature, as Retell doesn’t have access and control over the telephony provider and number[(1)](https://docs.retellai.com/deploy/custom-telephony). However, you can implement your own transfer logic using a custom function[(1)](https://docs.retellai.com/deploy/custom-telephony). \*\*