Phone numbers in Highland Park, Illinois
Highland Park has 15 phone prefixes in area codes 224, 847.
Biggest holders: AT&T (local phone), Onvoy, Bandwidth. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 7%
- Local phone company 53%
- Internet / business phone carrier 40%
Every prefix in Highland Park
Search the first six digits of a number in this list. If it's here, the number started in Highland Park with the carrier shown. If it isn't, check the Illinois page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 224-590 | Onvoy | Internet / business phone carrier | 2024 |
| 224-707 | Bandwidth | Internet / business phone carrier | 2014 |
| 224-754 | Verizon Wireless | Mobile carrier | 2016 |
| 224-765 | AT&T (local phone) | Local phone company | – |
| 224-786 | Fractel | Internet / business phone carrier | 2020 |
| 847-266 | AT&T (local phone) | Local phone company | – |
| 847-432 | AT&T (local phone) | Local phone company | – |
| 847-433 | AT&T (local phone) | Local phone company | – |
| 847-579 | AT&T (local phone) | Local phone company | – |
| 847-681 | AT&T (local phone) | Local phone company | – |
| 847-748 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 847-780 | Teleport Communications America | Internet / business phone carrier | – |
| 847-831 | AT&T (local phone) | Local phone company | – |
| 847-861 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 847-926 | 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.