Phone numbers in Itasca, Illinois
Itasca has 22 phone prefixes in area codes 331, 630, 847.
Biggest holders: AT&T (local phone), Onvoy, MCImetro (Verizon Business). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 5%
- Local phone company 36%
- Internet / business phone carrier 59%
Every prefix in Itasca
Search the first six digits of a number in this list. If it's here, the number started in Itasca with the carrier shown. If it isn't, check the Illinois page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 331-224 | Onvoy | Internet / business phone carrier | 2023 |
| 331-263 | Onvoy | Internet / business phone carrier | 2016 |
| 331-340 | Onvoy | Internet / business phone carrier | 2025 |
| 630-228 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 630-250 | AT&T (local phone) | Local phone company | – |
| 630-285 | AT&T (local phone) | Local phone company | – |
| 630-361 | T-Mobile (including Sprint) | Mobile carrier | – |
| 630-438 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 630-467 | AT&T (local phone) | Local phone company | – |
| 630-625 | Windstream (PAETEC) | Internet / business phone carrier | 2001 |
| 630-626 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 630-634 | Teleport Communications America | Internet / business phone carrier | – |
| 630-647 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 630-735 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 630-760 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 630-773 | AT&T (local phone) | Local phone company | – |
| 630-775 | AT&T (local phone) | Local phone company | – |
| 630-875 | AT&T (local phone) | Local phone company | – |
| 630-919 | Teleport Communications America | Internet / business phone carrier | – |
| 630-931 | Teleport Communications America | Internet / business phone carrier | – |
| 847-250 | AT&T (local phone) | Local phone company | – |
| 847-773 | 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.