NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2021-01-06 463-248 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NOBLESVL IN
2021-01-06 548-257 not yet reported which blocks → Fibernetics Corporation 464D Comber —
2021-01-06 548-258 not yet reported which blocks → Fibernetics Corporation 464D Stoney Point —
2021-01-06 548-259 not yet reported which blocks → Fibernetics Corporation 464D Woodslee —
2021-01-06 548-260 not yet reported which blocks → Fibernetics Corporation 464D Emeryville —
2021-01-06 548-261 not yet reported which blocks → Fibernetics Corporation 464D Pleasant Park —
2021-01-06 548-262 not yet reported which blocks → Fibernetics Corporation 464D Harrow —
2021-01-06 548-263 not yet reported which blocks → Fibernetics Corporation 464D La Salle —
2021-01-06 548-264 not yet reported which blocks → Fibernetics Corporation 464D Maidstone —
2021-01-06 548-265 not yet reported which blocks → Fibernetics Corporation 464D McGregor —
2021-01-06 548-266 not yet reported which blocks → Fibernetics Corporation 464D Pelee Island —
2021-01-06 548-267 not yet reported which blocks → Fibernetics Corporation 464D Wheatley —
2021-01-06 574-368 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ELKHART IN
2021-01-06 585-788 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC- NY 384C VICTOR NY
2021-01-06 586-355 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C RICHMOND MI
2021-01-06 586-544 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C UTICA MI
2021-01-06 639-593 not yet reported which blocks → Fibernetics Corporation 464D Outlook —
2021-01-06 639-594 not yet reported which blocks → Fibernetics Corporation 464D Watrous —
2021-01-06 639-595 not yet reported which blocks → Fibernetics Corporation 464D Fort Qu'Appelle —
2021-01-06 639-596 not yet reported which blocks → Fibernetics Corporation 464D Lumsden —
2021-01-06 659-217 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E W BLOCTON AL
2021-01-06 659-226 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - AL 604E CLANTON AL
2021-01-06 659-246 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E GARDENDALE AL
2021-01-06 659-266 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - AL 604E MONTEVALLO AL
2021-01-06 659-276 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - AL 604E PARRISH AL
2021-01-06 720-821 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CO 026D LONGMONT CO
2021-01-06 734-704 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLCV - MI 543C MANCHESTER MI
2021-01-06 803-930 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - SC 548E CHPNLTLMTS SC
2021-01-06 838-231 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC- NY 384C COLONIE NY
2021-01-06 838-830 0XXX1XXX2XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC- NY 384C ESPERANCE NY
2021-01-06 838-831 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC- NY 384C ELIZABTHTN NY
2021-01-06 838-832 1XXX2XXX3XXX4XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC- NY 384C DANNEMORA NY
2021-01-06 838-834 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC- NY 384C CLARKSVL NY
2021-01-06 838-835 1XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC- NY 384C CHATEAUGAY NY
2021-01-06 838-836 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC- NY 384C CATSKILL NY
2021-01-06 854-228 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - SC 548E CHERAW SC
2021-01-06 854-230 0XXX1XXX2XXX3XXX4XXX8XXX · 3 holders which blocks → ONVOY, LLC - SC 548E OLANTA SC
2021-01-06 854-242 2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - SC 548E KINGSTREE SC
2021-01-06 854-254 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - SC 548E WALTERBORO SC
2021-01-06 854-504 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - SC 548E NMYRTLEBCH SC
2021-01-06 864-691 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - SC 548E LYMAN SC
2021-01-06 864-692 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - SC 548E FOUNTANINN SC
2021-01-06 864-693 0XXX1XXX2XXX3XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - SC 548E CLINTON SC
2021-01-06 864-694 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - SC 548E PACOLET SC
2021-01-06 864-737 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - SC 548E BLACKSBURG SC
2021-01-06 864-738 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - SC 548E JONESVILLE SC
2021-01-06 864-739 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - SC 548E COWPENS SC
2021-01-06 864-750 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - SC 548E SALEM SC
2021-01-06 864-780 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - SC 548E CLEMSON SC
2021-01-06 864-818 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - SC 548E TRAVESREST SC

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.