NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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 |
|---|---|---|---|---|---|---|
| 2017-09-13 | 774-355 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | BUZZARDSBY | MA |
| 2013-06-12 | 774-801 | 0–9 XXXall 10 · 8 holders which blocks → | COMCAST IP PHONE, LLC | 318J | ORLEANS | MA |
| 2006-09-14 | 774-678 | 0–9 XXXall 10 · 6 holders which blocks → | COMCAST IP PHONE, LLC | 318J | WAREHAM | MA |
| 2002-06-07 | 774-849 | 0–9 XXXall 10 · 6 holders which blocks → | COMCAST IP PHONE, LLC | 318J | ROCHESTER | MA |
| 2002-04-02 | 774-885 | not yet reported which blocks → | COMCAST IP PHONE, LLC | 318J | NATICK | MA |
| 2001-03-20 | 774-202 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | NEWBEDFORD | MA |
| 2001-03-20 | 774-233 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | COMCAST IP PHONE, LLC | 318J | HOLLISTON | MA |
| 2001-03-20 | 774-565 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → | COMCAST IP PHONE, LLC | 318J | REHOBOTH | MA |
| 2001-03-20 | 774-719 | 0–9 XXXall 10 · 7 holders which blocks → | COMCAST IP PHONE, LLC | 318J | MANSFIELD | MA |
| 2001-03-19 | 774-215 | 2XXX4XXX5XXX · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | FOXBORO | MA |
| 2001-03-19 | 774-872 | 1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → | COMCAST IP PHONE, LLC | 318J | DIGHTON | MA |
| — | 774-373 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → | COMCAST IP PHONE, LLC | 318J | MIDDLEBORO | MA |
| — | 774-426 | 0–9 XXXall 10 · 6 holders which blocks → | COMCAST IP PHONE, LLC | 318J | PLYMOUTH | MA |
| — | 774-549 | 1XXX3XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | EDGARTOWN | MA |
| — | 774-582 | 0XXX1XXX3XXX4XXX5XXX6XXX9XXX · 6 holders which blocks → | COMCAST IP PHONE, LLC | 318J | MATTAPOSTT | MA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.