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 |
|---|---|---|---|---|---|---|
| 2022-08-05 | 240-943 | 0XXX2XXX9XXX · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | FROSTBURG | MD |
| 2015-11-10 | 240-830 | 0–9 XXXall 10 · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | WSHNGTNZN5 | MD |
| 2013-12-03 | 240-903 | 0–9 XXXall 10 · 5 holders which blocks → | COMCAST IP PHONE, LLC | 318J | INDIANHEAD | MD |
| 2013-04-25 | 240-467 | 0–9 XXXall 10 · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | WSHNGTNZN4 | MD |
| 2006-01-05 | 240-755 | 0–9 XXXall 10 · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | LAUREL238 | MD |
| 2004-11-22 | 240-770 | 0–9 XXXall 10 · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | WSHNGTNZN4 | MD |
| 2004-11-01 | 240-288 | 0–9 XXXall 10 · 6 holders which blocks → | COMCAST IP PHONE, LLC | 318J | THURMONT | MD |
| — | 240-262 | 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | LXTNPKGRML | MD |
| — | 240-280 | 0–9 XXXall 10 · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | LAUREL236 | MD |
| — | 240-483 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | COMCAST IP PHONE, LLC | 318J | WSHNGTNZN2 | MD |
| — | 240-619 | 0–9 XXXall 10 · 6 holders which blocks → | COMCAST IP PHONE, LLC | 318J | WSHNGTNZN5 | MD |
| — | 240-669 | 0–9 XXXall 10 · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | WSNGTNZN11 | MD |
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.