NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2023-01-30 562-636 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 —
2023-01-26 682-415 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 WEATHERFD TX
2023-01-26 873-448 not yet reported which blocks → Fibernetics Corporation 464D Drummondville —
2023-01-26 945-677 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 PROSPER TX
2023-01-26 945-678 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 MCKINNEY TX
2023-01-26 984-323 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 GOLDSBORO NC
2023-01-25 346-346 0–9 XXXall 10 · 3 holders which blocks → USFON, INC. - TX 473F FRIENDSWD TX
2023-01-25 423-550 0XXX1XXX2XXX5XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F MIDWAY TN
2023-01-25 430-316 1XXX2XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MIMS TX
2023-01-25 430-317 1XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HARLETON TX
2023-01-25 430-319 1XXX2XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 PRITCHETT TX
2023-01-25 430-320 0XXX1XXX2XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BETTIE TX
2023-01-25 430-321 1XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ROSEWOOD TX
2023-01-25 437-653 not yet reported which blocks → Bell Mobility 6574 Toronto —
2023-01-25 448-214 0XXX1XXX2XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BLOUNTSTN FL
2023-01-25 517-299 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E LANSING MI
2023-01-25 557-273 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 ST LOUIS MO

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.