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 |
|---|---|---|---|---|---|---|
| 2017-12-26 | 360-706 | 0–9 XXXall 10 · 6 holders which blocks → | COMCAST IP PHONE, LLC | 318J | OLYMPIA | WA |
| 2017-02-03 | 360-309 | 0–9 XXXall 10 · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | RIDGEFIELD | WA |
| 2015-07-23 | 360-505 | 0XXX2XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | GRAYHARBCO | WA |
| 2014-06-26 | 360-947 | 0–9 XXXall 10 · 5 holders which blocks → | COMCAST IP PHONE, LLC | 318J | VANCOUVER | WA |
| 2011-09-07 | 360-338 | 0–9 XXXall 10 · 8 holders which blocks → | COMCAST IP PHONE, LLC | 318J | OLYMPIA | WA |
| 2008-10-31 | 360-669 | 0–9 XXXall 10 · 5 holders which blocks → | COMCAST IP PHONE, LLC | 318J | CENTRALIA | WA |
| 2008-07-03 | 360-489 | 0–9 XXXall 10 · 5 holders which blocks → | COMCAST IP PHONE, LLC | 318J | OLYMPIA | WA |
| 2008-03-26 | 360-955 | 0XXX1XXX2XXX4XXX5XXX9XXX · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | YELM | WA |
| 2005-03-16 | 360-872 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | COMCAST IP PHONE, LLC | 318J | ORTING | WA |
| 2005-03-16 | 360-881 | 0XXX1XXX6XXX7XXX8XXX · 5 holders which blocks → | COMCAST IP PHONE, LLC | 318J | KINGSTON | WA |
| 2005-03-16 | 360-889 | 0–9 XXXall 10 · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | SO PRAIRIE | WA |
| 2004-12-30 | 360-572 | 0–9 XXXall 10 · 5 holders which blocks → | COMCAST IP PHONE, LLC | 318J | MARYSVILLE | WA |
| — | 360-210 | 1XXX2XXX3XXX6XXX8XXX9XXX · 2 holders which blocks → | COMCAST IP PHONE, LLC | 318J | CAMAS | WA |
| — | 360-960 | 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | YELM | WA |
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.