Phone numbers in Oak Lawn, Illinois
Oak Lawn has 33 phone prefixes in area codes 464, 708.
Biggest holders: AT&T (local phone), Onvoy, Level 3 (Lumen). This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 52%
- Internet / business phone carrier 39%
- Phone company 9%
Every prefix in Oak Lawn
Search the first six digits of a number in this list. If it's here, the number started in Oak Lawn with the carrier shown. If it isn't, check the Illinois page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 464-227 | Onvoy | Internet / business phone carrier | 2023 |
| 464-264 | Onvoy | Internet / business phone carrier | 2025 |
| 708-229 | AT&T (local phone) | Local phone company | – |
| 708-233 | AT&T (local phone) | Local phone company | – |
| 708-237 | AT&T (local phone) | Local phone company | – |
| 708-346 | AT&T (local phone) | Local phone company | – |
| 708-398 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 708-422 | AT&T (local phone) | Local phone company | – |
| 708-423 | AT&T (local phone) | Local phone company | – |
| 708-424 | AT&T (local phone) | Local phone company | – |
| 708-425 | AT&T (local phone) | Local phone company | – |
| 708-430 | AT&T (local phone) | Local phone company | – |
| 708-459 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 708-499 | AT&T (local phone) | Local phone company | – |
| 708-520 | AT&T (local phone) | Local phone company | 2012 |
| 708-529 | Comcast | Internet / business phone carrier | 2006 |
| 708-568 | Rcn Telecom Services Of Illinios | Phone company | – |
| 708-572 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 708-576 | First Communications | Phone company | – |
| 708-581 | Onvoy | Internet / business phone carrier | – |
| 708-598 | AT&T (local phone) | Local phone company | – |
| 708-599 | AT&T (local phone) | Local phone company | – |
| 708-634 | AT&T Enterprises | Phone company | 2006 |
| 708-636 | AT&T (local phone) | Local phone company | – |
| 708-658 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 708-684 | AT&T (local phone) | Local phone company | – |
| 708-741 | Windstream (PAETEC) | Internet / business phone carrier | 2001 |
| 708-857 | AT&T (local phone) | Local phone company | – |
| 708-876 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 708-907 | Teleport Communications America | Internet / business phone carrier | – |
| 708-930 | Teleport Communications America | Internet / business phone carrier | – |
| 708-931 | Onvoy | Internet / business phone carrier | – |
| 708-952 | AT&T (local phone) | Local phone company | – |
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.