Phone numbers in Newcastle, Oklahoma
Newcastle has 3 phone prefixes in area code 405.
Biggest holders: Pioneer Tel. Coop, Level 3 (Lumen). This is the local calling area (rate center) where those prefixes were first assigned.
- Internet / business phone carrier 33%
- Phone company 67%
Every prefix in Newcastle
Search the first six digits of a number in this list. If it's here, the number started in Newcastle with the carrier shown. If it isn't, check the Oklahoma page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 405-387 | Pioneer Tel. Coop | Phone company | – |
| 405-392 | Pioneer Tel. Coop | Phone company | – |
| 405-852 | Level 3 (Lumen) | Internet / business phone carrier | 2019 |
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.