NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026
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 |
|---|---|---|---|---|---|---|
| 2001-09-13 | 774-993 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | MILLIS | MA |
| 2001-08-13 | 774-487 | 2XXX3XXX4XXX5XXX6XXX · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | HYANNIS | MA |
| 2001-07-09 | 774-238 | 3XXX4XXX5XXX7XXX · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | OSTERVILLE | MA |
| 2001-07-09 | 774-994 | 2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BARNSTABLE | MA |
| 2001-07-06 | 774-313 | 1XXX2XXX3XXX4XXX5XXX · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | SAGAMORE | MA |
| 2001-07-06 | 774-766 | 3XXX4XXX5XXX6XXX · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | MIDDLEBORO | MA |
| 2001-06-29 | 774-501 | 0–9 XXXall 10 · 6 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | TAUNTON | MA |
| 2001-06-15 | 774-571 | 2XXX3XXX4XXX5XXX6XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | FRANKLIN | MA |
| 2001-05-23 | 774-217 | 3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | HOLLISTON | MA |
| 2001-05-18 | 774-757 | 0–9 XXXall 10 · 7 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | NOBROOKFLD | MA |
| 2001-05-09 | 774-218 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | TAUNTON | MA |
| 2001-05-09 | 774-249 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | MARLBORO | MA |
| 2001-04-24 | 774-454 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | PLYMOUTH | MA |
| 2001-03-20 | 774-488 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | FALL RIVER | MA |
| — | 774-363 | 0–9 XXXall 10 · 6 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | SAGAMORE | MA |
| — | 774-997 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | ATTLEBORO | MA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.