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
— 508-257 0XXX1XXX2XXX3XXX5XXX7XXX · 4 holders which blocks → VERIZON NEW ENGLAND INC. 9102 SIASCONSET MA
— 508-258 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 8 holders which blocks → PAETEC ITEL, LLC 829J DENNIS MA
— 508-259 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HOPKINTON MA
— 508-261 4XXX5XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 MANSFIELD MA
— 508-262 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H SEEKONK MA
— 508-264 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEWBEDFORD MA
— 508-265 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANDOVER MA
— 508-266 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → VERIZON NEW ENGLAND INC. 9102 WHITINSVL MA
— 508-267 1XXX3XXX4XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HOLDEN MA
— 508-268 not yet reported which blocks → NORFOLK COUNTY INTERNET, INC. 6083 MILFORD MA
— 508-269 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 EASTON MA
— 508-270 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 FRAMINGHAM MA
— 508-271 1XXX5XXX7XXX · 3 holders which blocks → VERIZON NEW ENGLAND INC. 9102 FRAMINGHAM MA
— 508-272 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 EASTON MA
— 508-273 2XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON NEW ENGLAND INC. 9102 WAREHAM MA
— 508-274 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 FALMOUTH MA
— 508-275 4XXX5XXX6XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 HOLLISTON MA
— 508-276 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J WAYLAND MA
— 508-277 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 MILLBURY MA
— 508-278 1XXX which blocks → VERIZON NEW ENGLAND INC. 9102 UXBRIDGE MA
— 508-279 5XXX which blocks → VERIZON NEW ENGLAND INC. 9102 BRIDGEWTR MA
— 508-280 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HYANNIS MA
— 508-281 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J MARLBORO MA
— 508-282 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → RCN TELECOM SERVICES, INC. - MA 7619 MILFORD MA
— 508-283 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 FRAMINGHAM MA
— 508-284 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GLOUCESTER MA
— 508-285 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 NORTON MA
— 508-286 6XXX7XXX8XXX · 3 holders which blocks → VERIZON NEW ENGLAND INC. 9102 NORTON MA
— 508-287 not yet reported which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 ROCHESTER MA
— 508-288 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 ASSONET MA
— 508-289 0XXX1XXX6XXX · 3 holders which blocks → VERIZON NEW ENGLAND INC. 9102 FALMOUTH MA
— 508-291 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WAREHAM MA
— 508-292 not yet reported which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 OSTERVILLE MA
— 508-293 0XXX1XXX3XXX4XXX5XXX9XXX · 2 holders which blocks → TC SYSTEMS, INC. 7135 HOPKINTON MA
— 508-294 none assigned yet which blocks → METROPCS, INC. 5562 HOPKINTON MA
— 508-295 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WAREHAM MA
— 508-296 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J CATAUMET MA
— 508-297 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → COMCAST IP PHONE, LLC 318J EASTON MA
— 508-298 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J FRANKLIN MA
— 508-299 0XXX1XXX3XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → VERIZON NEW ENGLAND INC. 9102 FALMOUTH MA
— 508-300 1XXX3XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FALL RIVER MA
— 508-301 5XXX6XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E TAUNTON MA
— 508-302 2XXX3XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FRAMINGHAM MA
— 508-303 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 MARLBORO MA
— 508-304 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 WORCESTER MA
— 508-305 2XXX5XXX · 2 holders which blocks → TC SYSTEMS, INC. 7135 MARLBORO MA
— 508-306 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 HOLLISTON MA
— 508-307 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 TAUNTON MA
— 508-309 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TC SYSTEMS, INC. 7135 FRAMINGHAM MA
— 508-310 2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NATICK 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.