NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

372 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 27
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
— 518-253 not yet reported which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ALBANY NY
— 518-254 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 COBLESKILL NY
— 518-255 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → TC SYSTEMS, INC. - NY 7140 COBLESKILL NY
— 518-256 4XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALBANY NY
— 518-257 0XXX2XXX6XXX9XXX which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-258 2XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALBANY NY
— 518-259 not yet reported which blocks → SPOK, INC. 6630 ALBANY NY
— 518-260 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GLENSFALLS NY
— 518-261 0XXX1XXX2XXX3XXX4XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J OAK HILL NY
— 518-262 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-263 0XXX1XXX2XXX3XXX6XXX7XXX8XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 HUNTER NY
— 518-265 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBANY NY
— 518-266 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 TROY NY
— 518-267 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → TC SYSTEMS, INC. - NY 7140 HUDSON NY
— 518-268 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → TC SYSTEMS, INC. - NY 7140 TROY NY
— 518-269 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALBANY NY
— 518-270 7XXX which blocks → VERIZON NEW YORK, INC. 9104 TROY NY
— 518-271 2XXX which blocks → VERIZON NEW YORK, INC. 9104 TROY NY
— 518-272 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 TROY NY
— 518-273 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 TROY NY
— 518-274 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 TROY NY
— 518-276 not yet reported which blocks → PAETEC ITEL, LLC 829J TROY NY
— 518-278 0XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → TVC ALBANY, INC. DBA FIRSTLIGHT FIBER 7989 JONESVILLE NY
— 518-279 2XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 TROY NY
— 518-280 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J SCHENCTADY NY
— 518-281 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBANY NY
— 518-282 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 HAMPTON NY
— 518-283 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 TROY NY
— 518-284 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 SHARON SPG NY
— 518-285 0XXX1XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 TROY NY
— 518-286 0XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 TROY NY
— 518-287 not yet reported which blocks → MIDDLEBURGH TEL. CO. 0105 SUMMIT NY
— 518-288 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 BALLSTNSPA NY
— 518-289 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 8 holders which blocks → TVC ALBANY, INC. DBA FIRSTLIGHT FIBER 7989 ROUND LAKE NY
— 518-290 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E SARATOGSPG NY
— 518-292 8XXX which blocks → TC SYSTEMS, INC. - NY 7140 ALBANY NY
— 518-293 0XXX2XXX3XXX4XXX5XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 SARANAC NY
— 518-294 0XXX1XXX3XXX4XXX5XXX7XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 RICHMONDVL NY
— 518-295 not yet reported which blocks → MIDDLEBURGH TEL. CO. 0105 MIDDLEBG NY
— 518-296 not yet reported which blocks → MIDDLEBURGH TEL. CO. 0105 BRAMANVL NY
— 518-297 not yet reported which blocks → CHAMPLAIN TEL. CO. 0077 ROUSES PT NY
— 518-298 not yet reported which blocks → CHAMPLAIN TEL. CO. 0077 CHAMPLAIN NY
— 518-299 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 PRATTSVL NY
— 518-301 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TC SYSTEMS, INC. - NY 7140 ALBANY NY
— 518-303 0XXX2XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 CATSKILL NY
— 518-304 0–9 XXXall 10 · 8 holders which blocks → TC SYSTEMS, INC. - NY 7140 SARANAC LK NY
— 518-306 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → AT&T - LOCAL 7421 SARATOGSPG NY
— 518-308 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 TROY NY
— 518-309 0–9 XXXall 10 · 7 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BALLSTNSPA NY
— 518-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY

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.