NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026
The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2018-03-19 | 484-656 | 0–9 XXXall 10 · 4 holders which blocks → | SERVICE ELECTRIC TELEPHONE COMPANY, LLC | 8320 | ALLENTOWN | PA |
| 2007-04-26 | 484-777 | 0–9 XXXwhole prefix which blocks → | SERVICE ELECTRIC TELEPHONE COMPANY, LLC | 8320 | BETHLEHEM | PA |
| — | 484-217 | 9XXX which blocks → | SERVICE ELECTRIC TELEPHONE COMPANY, LLC | 8320 | NEWTRIPOLI | PA |
| — | 484-287 | 9XXX which blocks → | SERVICE ELECTRIC TELEPHONE COMPANY, LLC | 8320 | BATH | PA |
| — | 484-298 | 9XXX which blocks → | SERVICE ELECTRIC TELEPHONE COMPANY, LLC | 8320 | NAZARETH | PA |
| — | 484-305 | 9XXX which blocks → | SERVICE ELECTRIC TELEPHONE COMPANY, LLC | 8320 | UPBLCKEDDY | PA |
| — | 484-308 | none assigned yet which blocks → | SERVICE ELECTRIC TELEPHONE COMPANY, LLC | 8320 | RIEGELSVL | PA |
| — | 484-504 | 9XXX which blocks → | SERVICE ELECTRIC TELEPHONE COMPANY, LLC | 8320 | NEWSMITHVL | PA |
| — | 484-817 | none assigned yet which blocks → | SERVICE ELECTRIC TELEPHONE COMPANY, LLC | 8320 | SPRINGTOWN | PA |
| — | 484-833 | 9XXX which blocks → | SERVICE ELECTRIC TELEPHONE COMPANY, LLC | 8320 | FERNDALE | PA |
| — | 484-863 | 9XXX which blocks → | SERVICE ELECTRIC TELEPHONE COMPANY, LLC | 8320 | COOPERSBG | PA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.