Phone numbers in Joliet, Illinois
Joliet has 88 phone prefixes in area codes 779, 815.
Biggest holders: AT&T Mobility, T-Mobile (including Sprint), AT&T (local phone). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 66%
- Local phone company 17%
- Internet / business phone carrier 14%
- Paging service 1%
- Phone company 2%
Every prefix in Joliet
Search the first six digits of a number in this list. If it's here, the number started in Joliet with the carrier shown. If it isn't, check the Illinois page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 779-205 | AT&T Mobility | Mobile carrier | 2012 |
| 779-206 | Verizon Wireless | Mobile carrier | 2012 |
| 779-225 | Verizon Wireless | Mobile carrier | 2011 |
| 779-227 | MetroPCS (T-Mobile) | Mobile carrier | 2014 |
| 779-230 | AT&T Mobility | Mobile carrier | 2016 |
| 779-231 | MCImetro (Verizon Business) | Internet / business phone carrier | 2015 |
| 779-233 | T-Mobile (including Sprint) | Mobile carrier | 2011 |
| 779-242 | AT&T Mobility | Mobile carrier | 2017 |
| 779-260 | AT&T Mobility | Mobile carrier | 2018 |
| 779-267 | AT&T Mobility | Mobile carrier | 2020 |
| 779-279 | AT&T Mobility | Mobile carrier | 2008 |
| 779-341 | AT&T Mobility | Mobile carrier | 2021 |
| 779-374 | Verizon Wireless | Mobile carrier | 2023 |
| 779-375 | AT&T Mobility | Mobile carrier | 2023 |
| 779-379 | AT&T Mobility | Mobile carrier | 2008 |
| 779-408 | Verizon Wireless | Mobile carrier | 2025 |
| 779-434 | AT&T Mobility | Mobile carrier | 2025 |
| 779-435 | AT&T (local phone) | Local phone company | 2006 |
| 779-449 | Verizon Wireless | Mobile carrier | 2026 |
| 779-456 | T-Mobile (including Sprint) | Mobile carrier | 2008 |
| 779-702 | T-Mobile (including Sprint) | Mobile carrier | 2014 |
| 779-703 | T-Mobile (including Sprint) | Mobile carrier | 2013 |
| 779-707 | Bandwidth | Internet / business phone carrier | 2015 |
| 779-758 | Fractel | Internet / business phone carrier | 2019 |
| 779-875 | T-Mobile (including Sprint) | Mobile carrier | 2007 |
| 779-939 | AT&T Mobility | Mobile carrier | 2016 |
| 815-203 | Spok | Paging service | – |
| 815-207 | Teleport Communications America | Internet / business phone carrier | – |
| 815-210 | AT&T Mobility | Mobile carrier | – |
| 815-212 | T-Mobile (including Sprint) | Mobile carrier | – |
| 815-258 | AT&T Mobility | Mobile carrier | – |
| 815-260 | T-Mobile (including Sprint) | Mobile carrier | – |
| 815-272 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 815-274 | AT&T Mobility | Mobile carrier | – |
| 815-280 | Teleport Communications America | Internet / business phone carrier | – |
| 815-302 | T-Mobile (including Sprint) | Mobile carrier | – |
| 815-325 | AT&T Mobility | Mobile carrier | – |
| 815-341 | AT&T Mobility | Mobile carrier | – |
| 815-342 | AT&T Mobility | Mobile carrier | – |
| 815-405 | T-Mobile (including Sprint) | Mobile carrier | – |
| 815-409 | Verizon Wireless | Mobile carrier | 2005 |
| 815-460 | First Communications | Phone company | – |
| 815-474 | AT&T Mobility | Mobile carrier | – |
| 815-483 | T-Mobile (including Sprint) | Mobile carrier | – |
| 815-514 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 815-530 | T-Mobile (including Sprint) | Mobile carrier | – |
| 815-531 | Teleport Communications America | Internet / business phone carrier | – |
| 815-545 | AT&T Mobility | Mobile carrier | – |
| 815-546 | AT&T Mobility | Mobile carrier | – |
| 815-553 | Windstream (PAETEC) | Internet / business phone carrier | 2001 |
| 815-557 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 815-582 | T-Mobile (including Sprint) | Mobile carrier | 2005 |
| 815-600 | AT&T Mobility | Mobile carrier | 2003 |
| 815-603 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 815-630 | T-Mobile (including Sprint) | Mobile carrier | 2006 |
| 815-641 | Verizon Wireless | Mobile carrier | 2008 |
| 815-651 | Rcn Telecom Services Of Illinios | Phone company | – |
| 815-666 | Verizon Wireless | Mobile carrier | 2006 |
| 815-671 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 815-685 | AT&T Mobility | Mobile carrier | – |
| 815-690 | T-Mobile (including Sprint) | Mobile carrier | – |
| 815-693 | T-Mobile (including Sprint) | Mobile carrier | – |
| 815-714 | Bandwidth | Internet / business phone carrier | – |
| 815-715 | AT&T Mobility | Mobile carrier | 2001 |
| 815-722 | AT&T (local phone) | Local phone company | – |
| 815-723 | AT&T (local phone) | Local phone company | – |
| 815-724 | AT&T (local phone) | Local phone company | – |
| 815-725 | AT&T (local phone) | Local phone company | – |
| 815-726 | AT&T (local phone) | Local phone company | – |
| 815-727 | AT&T (local phone) | Local phone company | – |
| 815-729 | AT&T (local phone) | Local phone company | – |
| 815-730 | AT&T (local phone) | Local phone company | – |
| 815-735 | AT&T Mobility | Mobile carrier | – |
| 815-740 | AT&T (local phone) | Local phone company | – |
| 815-741 | AT&T (local phone) | Local phone company | – |
| 815-744 | AT&T (local phone) | Local phone company | – |
| 815-763 | Verizon Wireless | Mobile carrier | 2022 |
| 815-768 | AT&T (local phone) | Local phone company | – |
| 815-773 | AT&T (local phone) | Local phone company | – |
| 815-774 | AT&T (local phone) | Local phone company | – |
| 815-791 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 815-823 | T-Mobile (including Sprint) | Mobile carrier | – |
| 815-846 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 815-919 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 815-927 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 815-931 | AT&T Mobility | Mobile carrier | – |
| 815-955 | MetroPCS (T-Mobile) | Mobile carrier | 2002 |
| 815-999 | T-Mobile (including Sprint) | Mobile carrier | 2003 |
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.