NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

375 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/30/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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.

Most active assignees, last 30 days
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Quick find in this area code:
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 413-568 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WESTFIELD MA
— 413-569 7XXX8XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 SOUTHWICK MA
— 413-570 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J NORTHAMPTN MA
— 413-572 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WESTFIELD MA
— 413-573 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 AMHERST MA
— 413-575 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HOLYOKE MA
— 413-577 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 AMHERST MA
— 413-578 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 PALMER MA
— 413-579 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TC SYSTEMS, INC. 7135 WESTFIELD MA
— 413-581 not yet reported which blocks → PAETEC ITEL, LLC 829J CHESTERFLD MA
— 413-582 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 NORTHAMPTN MA
— 413-583 0XXX1XXX9XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 LUDLOW MA
— 413-584 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 NORTHAMPTN MA
— 413-585 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 NORTHAMPTN MA
— 413-586 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 NORTHAMPTN MA
— 413-587 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 NORTHAMPTN MA
— 413-588 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TC SYSTEMS, INC. 7135 NORTHAMPTN MA
— 413-589 3XXX5XXX8XXX which blocks → VERIZON NEW ENGLAND INC. 9102 LUDLOW MA
— 413-591 1XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 GREATBNGTN MA
— 413-592 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 CHICOPEE MA
— 413-593 8XXX which blocks → VERIZON NEW ENGLAND INC. 9102 CHICOPEE MA
— 413-594 0XXX which blocks → VERIZON NEW ENGLAND INC. 9102 CHICOPEE MA
— 413-596 1XXX7XXX which blocks → VERIZON NEW ENGLAND INC. 9102 WILBRAHAM MA
— 413-597 0XXX1XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW ENGLAND INC. 9102 WILLIAMSTN MA
— 413-598 1XXX which blocks → VERIZON NEW ENGLAND INC. 9102 CHICOPEE MA
— 413-599 3XXX5XXX6XXX8XXX · 3 holders which blocks → VERIZON NEW ENGLAND INC. 9102 WILBRAHAM MA
— 413-600 0XXX1XXX2XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - MA 892D STOCKBDG MA
— 413-603 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NORTHADAMS MA
— 413-604 not yet reported which blocks → ONVOY, LLC - MA 892D EASTHAMPTN MA
— 413-610 0XXX1XXX2XXX3XXX4XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J LUDLOW MA
— 413-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MA
— 413-612 4XXX5XXX7XXX8XXX which blocks → PAETEC ITEL, LLC 829J CHICOPEE MA
— 413-614 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 NORTHAMPTN MA
— 413-616 1XXX3XXX6XXX7XXX8XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K OTIS MA
— 413-617 not yet reported which blocks → MA
— 413-618 not yet reported which blocks → PAETEC ITEL, LLC 829J CONWAY MA
— 413-622 not yet reported which blocks → PAETEC ITEL, LLC 829J GRANVILLE MA
— 413-623 1XXX3XXX4XXX7XXX9XXX · 4 holders which blocks → VERIZON NEW ENGLAND INC. 9102 BECKET MA
— 413-624 2XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON NEW ENGLAND INC. 9102 COLRAIN MA
— 413-625 1XXX3XXX4XXX5XXX7XXX · 5 holders which blocks → VERIZON NEW ENGLAND INC. 9102 SHELBUNFLS MA
— 413-626 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA
— 413-627 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA
— 413-628 1XXX2XXX5XXX6XXX9XXX · 4 holders which blocks → VERIZON NEW ENGLAND INC. 9102 ASHFIELD MA
— 413-629 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J PITTSFIELD MA
— 413-631 1XXX4XXX6XXX which blocks → TC SYSTEMS, INC. 7135 LUDLOW MA
— 413-634 1XXX3XXX4XXX6XXX7XXX · 5 holders which blocks → VERIZON NEW ENGLAND INC. 9102 CUMMINGTON MA
— 413-637 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 LENOX MA
— 413-638 not yet reported which blocks → PAETEC ITEL, LLC 829J HOUSATONIC MA
— 413-639 not yet reported which blocks → PAETEC ITEL, LLC 829J WESTFIELD MA
— 413-640 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 PALMER 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.