Phone numbers in Lockport, Illinois
Lockport has 21 phone prefixes in area codes 779, 815.
Biggest holders: AT&T (local phone), Level 3 (Lumen), T-Mobile (including Sprint). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 14%
- Local phone company 43%
- Internet / business phone carrier 33%
- Phone company 10%
Every prefix in Lockport
Search the first six digits of a number in this list. If it's here, the number started in Lockport with the carrier shown. If it isn't, check the Illinois page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 779-390 | T-Mobile (including Sprint) | Mobile carrier | 2024 |
| 779-445 | MetroPCS (T-Mobile) | Mobile carrier | 2022 |
| 779-780 | T-Mobile (including Sprint) | Mobile carrier | 2026 |
| 815-221 | Teleport Communications America | Internet / business phone carrier | – |
| 815-293 | AT&T (local phone) | Local phone company | – |
| 815-306 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 815-328 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 815-372 | AT&T (local phone) | Local phone company | – |
| 815-407 | AT&T (local phone) | Local phone company | – |
| 815-461 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 815-512 | First Communications | Phone company | – |
| 815-524 | Teleport Communications America | Internet / business phone carrier | – |
| 815-552 | AT&T (local phone) | Local phone company | 2001 |
| 815-588 | AT&T (local phone) | Local phone company | – |
| 815-660 | Rcn Telecom Services Of Illinios | Phone company | – |
| 815-749 | Bandwidth | Internet / business phone carrier | 2022 |
| 815-834 | AT&T (local phone) | Local phone company | – |
| 815-836 | AT&T (local phone) | Local phone company | – |
| 815-838 | AT&T (local phone) | Local phone company | – |
| 815-886 | AT&T (local phone) | Local phone company | – |
| 815-905 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
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.