Phone numbers in Cairo, Illinois
Cairo has 8 phone prefixes in area codes 618, 730.
Biggest holders: Verizon Wireless, Vonage America, AT&T (local phone). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 12%
- Local phone company 12%
- Internet / business phone carrier 50%
- Phone company 25%
Every prefix in Cairo
Search the first six digits of a number in this list. If it's here, the number started in Cairo with the carrier shown. If it isn't, check the Illinois page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 618-306 | Verizon Wireless | Mobile carrier | 2004 |
| 618-621 | Vonage America | Internet / business phone carrier | 2020 |
| 618-734 | AT&T (local phone) | Local phone company | – |
| 618-805 | IP Horizon | Internet / business phone carrier | 2021 |
| 618-930 | Commio | Internet / business phone carrier | 2023 |
| 730-225 | Callworks | Phone company | 2023 |
| 730-333 | Terra Nova Telecom | Internet / business phone carrier | 2025 |
| 730-465 | Ahoi | 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.