NumberResearch Membership · Data 10/01/2026

Recent prefix assignments

374 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 10/01/2026

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 Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 508-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MA
— 508-312 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 FRAMINGHAM MA
— 508-313 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BROCKTON MA
— 508-314 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NATICK MA
— 508-315 1XXX2XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → RCN TELECOM SERVICES, INC. - MA 7619 NATICK MA
— 508-316 2XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J NO ATTLEBO MA
— 508-317 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WAREHAM MA
— 508-318 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NATICK MA
— 508-319 1XXX9XXX which blocks → PAETEC ITEL, LLC 829J NATICK MA
— 508-320 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 GRAFTON MA
— 508-321 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J MEDWAY MA
— 508-323 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 FRAMINGHAM MA
— 508-324 none assigned yet which blocks → VERIZON NEW ENGLAND INC. 9102 FALL RIVER MA
— 508-325 9XXX which blocks → VERIZON NEW ENGLAND INC. 9102 NANTUCKET MA
— 508-326 none assigned yet which blocks → METROPCS, INC. 5562 BROCKTON MA
— 508-327 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 AUBURN MA
— 508-328 none assigned yet which blocks → METROPCS, INC. 5562 HOPKINTON MA
— 508-329 1XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WESTBORO MA
— 508-330 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WESTBORO MA
— 508-331 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FITCHBURG MA
— 508-332 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 NANTUCKET MA
— 508-333 not yet reported which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 NATICK MA
— 508-334 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WORCESTER MA
— 508-335 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WORCESTER MA
— 508-336 1XXX which blocks → VERIZON NEW ENGLAND INC. 9102 SEEKONK MA
— 508-337 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 MANSFIELD MA
— 508-338 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 VINEYRDHVN MA
— 508-339 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 MANSFIELD MA
— 508-341 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 E DOUGLAS MA
— 508-342 5XXX8XXX which blocks → PAETEC ITEL, LLC 829J ATTLEBORO MA
— 508-343 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → TC SYSTEMS, INC. 7135 SEEKONK MA
— 508-344 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 STURBRIDGE MA
— 508-345 not yet reported which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 BROCKTON MA
— 508-346 2XXX6XXX9XXX · 3 holders which blocks → TC SYSTEMS, INC. 7135 FRANKLIN MA
— 508-347 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 STURBRIDGE MA
— 508-348 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → COMCAST IP PHONE, LLC 318J CHATHAM MA
— 508-349 4XXX5XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 WELLFLEET MA
— 508-350 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON NEW ENGLAND INC. 9102 EBRIDGEWTR MA
— 508-351 0XXX which blocks → VERIZON NEW ENGLAND INC. 9102 NORTHBORO MA
— 508-352 not yet reported which blocks → NORFOLK COUNTY INTERNET, INC. 6083 WORCESTER MA
— 508-353 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WORCESTER MA
— 508-354 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 FRAMINGHAM MA
— 508-355 3XXX7XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MARION MA
— 508-356 3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J CATAUMET MA
— 508-357 none assigned yet which blocks → VERIZON NEW ENGLAND INC. 9102 MARLBORO MA
— 508-358 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WAYLAND MA
— 508-359 3XXX which blocks → VERIZON NEW ENGLAND INC. 9102 MEDFIELD MA
— 508-360 none assigned yet which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 HYANNIS MA
— 508-361 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FRAMINGHAM MA
— 508-362 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BARNSTABLE MA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 10/01/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.