Phone numbers in Rock Island, Illinois
Rock Island has 42 phone prefixes in area codes 309, 861.
Biggest holders: AT&T (local phone), T-Mobile (including Sprint), Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 48%
- Local phone company 29%
- Internet / business phone carrier 17%
- Phone company 7%
Every prefix in Rock Island
Search the first six digits of a number in this list. If it's here, the number started in Rock Island with the carrier shown. If it isn't, check the Illinois page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 309-206 | AT&T (local phone) | Local phone company | 2011 |
| 309-230 | Verizon Wireless | Mobile carrier | 2001 |
| 309-235 | Verizon Wireless | Mobile carrier | – |
| 309-236 | Verizon Wireless | Mobile carrier | – |
| 309-269 | T-Mobile (including Sprint) | Mobile carrier | – |
| 309-283 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 309-292 | T-Mobile (including Sprint) | Mobile carrier | – |
| 309-317 | AT&T Mobility | Mobile carrier | 2017 |
| 309-350 | T-Mobile (including Sprint) | Mobile carrier | 2018 |
| 309-373 | UScellular | Mobile carrier | – |
| 309-380 | MCImetro (Verizon Business) | Internet / business phone carrier | 2024 |
| 309-400 | AT&T Enterprises | Phone company | 2024 |
| 309-428 | T-Mobile (including Sprint) | Mobile carrier | 2008 |
| 309-429 | Verizon Wireless | Mobile carrier | 2011 |
| 309-430 | Geneseo Communications Services | Phone company | 2015 |
| 309-506 | T-Mobile (including Sprint) | Mobile carrier | 2018 |
| 309-519 | AT&T Mobility | Mobile carrier | 2018 |
| 309-520 | T-Mobile (including Sprint) | Mobile carrier | 2019 |
| 309-553 | T-Mobile (including Sprint) | Mobile carrier | 2019 |
| 309-558 | AT&T (local phone) | Local phone company | – |
| 309-592 | AT&T Mobility | Mobile carrier | 2017 |
| 309-607 | Onvoy | Internet / business phone carrier | 2015 |
| 309-631 | T-Mobile (including Sprint) | Mobile carrier | – |
| 309-644 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 309-721 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 309-732 | AT&T (local phone) | Local phone company | – |
| 309-737 | UScellular | Mobile carrier | – |
| 309-738 | UScellular | Mobile carrier | – |
| 309-756 | AT&T (local phone) | Local phone company | – |
| 309-779 | AT&T (local phone) | Local phone company | – |
| 309-781 | Verizon Wireless | Mobile carrier | – |
| 309-782 | AT&T (local phone) | Local phone company | – |
| 309-786 | AT&T (local phone) | Local phone company | – |
| 309-787 | AT&T (local phone) | Local phone company | – |
| 309-788 | AT&T (local phone) | Local phone company | – |
| 309-793 | AT&T (local phone) | Local phone company | – |
| 309-794 | AT&T (local phone) | Local phone company | – |
| 309-798 | AT&T (local phone) | Local phone company | – |
| 309-903 | Onvoy | Internet / business phone carrier | 2020 |
| 309-930 | Nuso | Internet / business phone carrier | 2023 |
| 309-948 | Level 3 (Lumen) | Internet / business phone carrier | 2006 |
| 861-777 | Exiant Communications | Phone company | 2026 |
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.