Phone numbers in East Chicago, Indiana
East Chicago has 22 phone prefixes in area code 219.
Biggest holders: T-Mobile (including Sprint), AT&T (local phone), First Communications. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 45%
- Local phone company 36%
- Internet / business phone carrier 14%
- Phone company 5%
Every prefix in East Chicago
Search the first six digits of a number in this list. If it's here, the number started in East Chicago with the carrier shown. If it isn't, check the Indiana page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 219-256 | T-Mobile (including Sprint) | Mobile carrier | 2007 |
| 219-276 | T-Mobile (including Sprint) | Mobile carrier | 2012 |
| 219-289 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 219-298 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 219-315 | T-Mobile (including Sprint) | Mobile carrier | 2013 |
| 219-316 | T-Mobile (including Sprint) | Mobile carrier | 2013 |
| 219-341 | T-Mobile (including Sprint) | Mobile carrier | 2023 |
| 219-354 | First Communications | Phone company | 2002 |
| 219-377 | T-Mobile (including Sprint) | Mobile carrier | 2024 |
| 219-378 | AT&T (local phone) | Local phone company | – |
| 219-391 | AT&T (local phone) | Local phone company | – |
| 219-392 | AT&T (local phone) | Local phone company | – |
| 219-397 | AT&T (local phone) | Local phone company | – |
| 219-398 | AT&T (local phone) | Local phone company | – |
| 219-399 | AT&T (local phone) | Local phone company | – |
| 219-413 | Bandwidth | Internet / business phone carrier | 2010 |
| 219-466 | TON80 Communications | Internet / business phone carrier | 2022 |
| 219-516 | T-Mobile (including Sprint) | Mobile carrier | 2015 |
| 219-703 | AT&T (local phone) | Local phone company | 2013 |
| 219-800 | Onvoy | Internet / business phone carrier | 2017 |
| 219-801 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 219-804 | CenturyLink / Lumen | Local phone company | 2013 |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number. Source: NANPA central office code records, 2026-10-10.