Phone numbers in New London, Wisconsin
New London has 10 phone prefixes in area codes 274, 920.
Biggest holders: AT&T Mobility, T-Mobile (including Sprint), Level 3 (Lumen). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 70%
- Local phone company 10%
- Internet / business phone carrier 10%
- Phone company 10%
Every prefix in New London
Search the first six digits of a number in this list. If it's here, the number started in New London with the carrier shown. If it isn't, check the Wisconsin page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 274-201 | T-Mobile (including Sprint) | Mobile carrier | 2024 |
| 920-249 | AT&T Mobility | Mobile carrier | – |
| 920-250 | AT&T Mobility | Mobile carrier | – |
| 920-359 | AT&T Mobility | Mobile carrier | – |
| 920-389 | AT&T Mobility | Mobile carrier | – |
| 920-472 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 920-531 | AT&T Enterprises | Phone company | 2002 |
| 920-538 | UScellular | Mobile carrier | – |
| 920-878 | Metro Southwest Pcs, Llp | Mobile carrier | 2003 |
| 920-982 | 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.