Recent prefix assignments
375 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/30/2026
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 |
|---|---|---|---|---|---|---|
| — | 413-508 | not yet reported which blocks → | MA | |||
| — | 413-509 | 0XXX2XXX4XXX5XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | WILBRAHAM | MA |
| — | 413-511 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | MA |
| — | 413-512 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | GREENFIELD | MA |
| — | 413-513 | not yet reported which blocks → | PAETEC ITEL, LLC | 829J | WILBRAHAM | MA |
| — | 413-517 | 4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | NORTHAMPTN | MA |
| — | 413-518 | not yet reported which blocks → | MA | |||
| — | 413-519 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | SPRINGFLD | MA |
| — | 413-521 | not yet reported which blocks → | PAETEC ITEL, LLC | 829J | BRIMFIELD | MA |
| — | 413-522 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | GREENFIELD | MA |
| — | 413-523 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | SPRINGFLD | MA |
| — | 413-525 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | ELONGMEDOW | MA |
| — | 413-526 | 0XXX3XXX6XXX7XXX · 4 holders which blocks → | VERIZON NEW ENGLAND INC. | 9102 | ELONGMEDOW | MA |
| — | 413-527 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | EASTHAMPTN | MA |
| — | 413-528 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | GREATBNGTN | MA |
| — | 413-529 | 4XXX5XXX6XXX8XXX · 3 holders which blocks → | VERIZON NEW ENGLAND INC. | 9102 | EASTHAMPTN | MA |
| — | 413-530 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | HOLYOKE | MA |
| — | 413-531 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | HOLYOKE | MA |
| — | 413-532 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | HOLYOKE | MA |
| — | 413-533 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | HOLYOKE | MA |
| — | 413-534 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | HOLYOKE | MA |
| — | 413-535 | none assigned yet which blocks → | VERIZON NEW ENGLAND INC. | 9102 | HOLYOKE | MA |
| — | 413-536 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | HOLYOKE | MA |
| — | 413-537 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | HOLYOKE | MA |
| — | 413-538 | 4XXX which blocks → | VERIZON NEW ENGLAND INC. | 9102 | HOLYOKE | MA |
| — | 413-539 | none assigned yet which blocks → | VERIZON NEW ENGLAND INC. | 9102 | HOLYOKE | MA |
| — | 413-540 | 6XXX7XXX8XXX · 3 holders which blocks → | VERIZON NEW ENGLAND INC. | 9102 | HOLYOKE | MA |
| — | 413-541 | 3XXX9XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | GREATBNGTN | MA |
| — | 413-542 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | AMHERST | MA |
| — | 413-543 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | SPRINGFLD | MA |
| — | 413-545 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | AMHERST | MA |
| — | 413-546 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | AMHERST | MA |
| — | 413-547 | 1XXX3XXX4XXX · 3 holders which blocks → | VERIZON NEW ENGLAND INC. | 9102 | LUDLOW | MA |
| — | 413-548 | 0XXX1XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → | VERIZON NEW ENGLAND INC. | 9102 | AMHRSTFKLN | MA |
| — | 413-549 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | AMHERST | MA |
| — | 413-550 | not yet reported which blocks → | MA | |||
| — | 413-552 | none assigned yet which blocks → | VERIZON NEW ENGLAND INC. | 9102 | HOLYOKE | MA |
| — | 413-553 | 1XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | PITTSFIELD | MA |
| — | 413-554 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | XXXXXXXXXX | MA |
| — | 413-555 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | DIR ASST | MA |
| — | 413-556 | not yet reported which blocks → | PAETEC ITEL, LLC | 829J | CHESTER | MA |
| — | 413-557 | 0XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → | VERIZON NEW ENGLAND INC. | 9102 | CHICOPEE | MA |
| — | 413-559 | 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → | TC SYSTEMS, INC. | 7135 | AMHRSTFKLN | MA |
| — | 413-561 | 1XXX3XXX5XXX6XXX8XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HOLYOKE | MA |
| — | 413-562 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | WESTFIELD | MA |
| — | 413-563 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | SPRINGFLD | MA |
| — | 413-564 | 1XXX4XXX7XXX9XXX which blocks → | VERIZON NEW ENGLAND INC. | 9102 | WESTFIELD | MA |
| — | 413-565 | 3XXX7XXX8XXX9XXX which blocks → | VERIZON NEW ENGLAND INC. | 9102 | LONGMEADOW | MA |
| — | 413-566 | 1XXX6XXX7XXX9XXX · 4 holders which blocks → | VERIZON NEW ENGLAND INC. | 9102 | HAMPDEN | MA |
| — | 413-567 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | LONGMEADOW | MA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.