NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
2023-01-31 474-676 not yet reported which blocks → Fibernetics Corporation 464D Hepburn —
2023-01-31 474-677 not yet reported which blocks → Fibernetics Corporation 464D Meacham —
2023-01-31 534-504 4XXX9XXX · 2 holders which blocks → COMMIO, LLC 939H EAU CLAIRE WI
2023-01-31 581-402 not yet reported which blocks → Iristel Inc. 346J Rimouski —
2023-01-31 719-730 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 ARRIBA CO
2023-01-31 820-823 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C SANTA YNEZ CA
2023-01-31 835-214 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 NORTHAMPTN PA
2023-01-31 906-200 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J IRON MT MI
2023-01-31 980-405 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LINCOLNTON NC
2023-01-30 314-816 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LADUE MO
2023-01-30 409-303 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → METROPCS, INC. 5562 ORANGE TX
2023-01-30 430-322 0–9 XXXall 10 · 5 holders which blocks → CROSS WIRELESS, L.L.C. 148G PARIS TX
2023-01-30 458-294 0XXX5XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 MARCOLA OR
2023-01-30 458-295 5XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 JEFFERSON OR
2023-01-30 472-204 6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SNEADSFRRY NC
2023-01-30 507-904 0XXX1XXX7XXX8XXX · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J HAYFIELD MN
2023-01-30 562-636 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 DOWNEY CA
2023-01-30 605-512 8XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J NEWUNDERWD SD
2023-01-30 657-658 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-01-30 672-968 not yet reported which blocks → TELUS Mobility 8301 Vancouver —
2023-01-30 712-410 9XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LARCHWOOD IA
2023-01-30 726-236 0–9 XXXwhole prefix which blocks → TWC IP ENABLED SERVICES, LLC 793K SANANTONIO TX
2023-01-30 742-987 not yet reported which blocks → TELUS Mobility 8303 Ajax-Pickering —
2023-01-30 765-816 9XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J MORRISTOWN IN
2023-01-30 825-966 not yet reported which blocks → TELUS Mobility 8301 Edmonton —
2023-01-30 863-335 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 WINTER HVN FL
2023-01-30 904-882 0–9 XXXall 10 · 4 holders which blocks → POWERTEL JACKSONVILLE LICENSES, INC. 7472 JACKSONVL FL
2023-01-30 904-883 0–9 XXXall 10 · 3 holders which blocks → POWERTEL JACKSONVILLE LICENSES, INC. 7472 JACKSONVL FL
2023-01-30 907-501 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC 724J JUNEAU AK
2023-01-30 930-271 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J NEWBURGH IN
2023-01-30 945-289 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FRISCO TX
2023-01-27 260-325 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 2 holders which blocks → COMMIO, LLC 939H ALBION IN
2023-01-27 262-350 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WAUKESHA WI
2023-01-27 425-472 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BELLEVUE WA
2023-01-27 435-329 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BOULDER UT
2023-01-27 435-330 0XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CANNONVL UT
2023-01-27 435-331 1XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DUCK CREEK UT
2023-01-27 458-293 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 STANFIELD OR
2023-01-27 620-880 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → COMMIO, LLC 939H WINFIELD KS
2023-01-27 626-681 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 EL MONTE CA
2023-01-27 726-235 0–9 XXXwhole prefix which blocks → TWC IP ENABLED SERVICES, LLC 793K SANANTONIO TX
2023-01-27 762-342 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 COLUMBUS GA
2023-01-27 907-405 0XXX1XXX2XXX6XXX8XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC 724J FAIRBANKS AK
2023-01-27 971-448 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2023-01-26 279-230 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 RSVL MAIN CA
2023-01-26 385-514 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 OGDEN UT
2023-01-26 424-486 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 CMTN GRDN CA
2023-01-26 445-278 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHPHSBZN43 PA
2023-01-26 548-380 not yet reported which blocks → Fibernetics Corporation 464D Acton —
2023-01-26 548-381 not yet reported which blocks → Fibernetics Corporation 464D Rockwood —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.