NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

334 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 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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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2021-10-25 928-732 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H LKHAVASUCY AZ
2021-10-25 930-251 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → NUSO, LLC 478J EVANSVILLE IN
2021-10-25 971-415 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F PORTLAND OR
2021-10-25 986-213 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J BOISE ID
2021-10-25 986-215 1XXX5XXX · 2 holders which blocks → IP HORIZON LLC 515J COERDALENE ID
2021-10-22 216-457 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2021-10-22 216-460 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 MONTRSE OH
2021-10-22 216-463 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2021-10-22 216-467 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 TERRACE OH
2021-10-22 276-280 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H BLUEFIELD VA
2021-10-22 351-667 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H ACTON MA
2021-10-22 360-803 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WA 483E RIDGEFIELD WA
2021-10-22 367-380 not yet reported which blocks → Videotron Ltd. 328F Quebec —
2021-10-22 438-376 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2021-10-22 559-628 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CLOVIS CA
2021-10-22 667-788 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → QUANTUM TELECOMMUNICATIONS, INC. - MD 2596 WESTMINSTR MD
2021-10-22 672-873 not yet reported which blocks → Fibernetics Corporation 464D Holberg —
2021-10-22 672-874 not yet reported which blocks → Fibernetics Corporation 464D Ganges —
2021-10-22 672-875 not yet reported which blocks → Fibernetics Corporation 464D Fulford Harbour —
2021-10-22 689-946 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H WINTERGRDN FL
2021-10-22 725-263 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F LAS VEGAS NV
2021-10-22 725-264 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LAS VEGAS NV
2021-10-22 737-308 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2021-10-22 743-231 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H MADISON NC
2021-10-22 743-237 0XXX1XXX3XXX4XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H QUAKER GAP NC
2021-10-22 743-296 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H REIDSVILLE NC
2021-10-22 743-347 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - NC 638E THOMASVL NC
2021-10-22 743-369 0XXX1XXX2XXX3XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H SANDYRIDGE NC
2021-10-22 772-779 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - FL 937C STUART FL
2021-10-22 774-789 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H BARNSTABLE MA
2021-10-22 781-822 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H WALTHAM MA
2021-10-22 873-818 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Ville-Marie —
2021-10-22 939-410 0–9 XXXwhole prefix which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J SANTURCE PR
2021-10-22 986-212 0–9 XXXall 10 · 5 holders which blocks → AT&T - LOCAL 7421 EMMETT ID
2021-10-21 321-521 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - FL 937C COCOABEACH FL
2021-10-21 386-946 0XXX2XXX3XXX4XXX5XXX6XXX · 5 holders which blocks → FRACTEL, LLC 965H JASPER FL
2021-10-21 720-637 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CO 026D DENVER CO
2021-10-21 720-843 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H DENVER CO
2021-10-21 731-291 0XXX1XXX3XXX8XXX9XXX · 5 holders which blocks → AT&T - LOCAL 7421 BELLS TN
2021-10-21 743-330 0–9 XXXall 10 · 3 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J ELKIN NC
2021-10-21 743-433 0–9 XXXall 10 · 4 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J GREENSBORO NC
2021-10-21 785-631 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → NUSO, LLC 478J TOPEKA KS
2021-10-21 812-960 0XXX1XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H PRAIRIECRK IN
2021-10-21 828-500 0–9 XXXall 10 · 4 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J ASHEVILLE NC
2021-10-21 907-603 6XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC 724J JUNEAU AK
2021-10-21 954-795 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 FTLAUDERDL FL
2021-10-21 980-844 0–9 XXXall 10 · 5 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J CONCORD NC
2021-10-20 207-414 0XXX1XXX2XXX5XXX9XXX · 3 holders which blocks → COMMIO, LLC 939H HOULTON ME
2021-10-20 216-435 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F CLEVELAND OH
2021-10-20 225-340 0XXX1XXX2XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H WILSON LA

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.