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
2022-09-01 251-678 1XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → ONVOY, LLC - AL 604E ATMORE AL
2022-09-01 253-453 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WA 483E TACOMAWVLY WA
2022-09-01 260-321 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F FORT WAYNE IN
2022-09-01 262-762 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - WI 225C DELAVAN WI
2022-09-01 302-201 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J FREDERICA DE
2022-09-01 318-836 0XXX1XXX2XXX3XXX4XXX6XXX9XXX · 4 holders which blocks → ONVOY, LLC - LA 749E JENA LA
2022-09-01 330-226 0XXX2XXX6XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H SUGARCREEK OH
2022-09-01 341-512 0–9 XXXall 10 · 3 holders which blocks → SONIC TELECOM, LLC - CA 433E OKLD BKLY CA
2022-09-01 409-295 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C GALVESTON TX
2022-09-01 419-926 0XXX1XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H GREENWICH OH
2022-09-01 425-552 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WA 483E SILVERLAKE WA
2022-09-01 430-413 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C GREENVILLE TX
2022-09-01 437-428 not yet reported which blocks → Bell Mobility 6574 Toronto —
2022-09-01 502-692 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - KY 896E SHELBYVL KY
2022-09-01 561-407 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E DELRAY BCH FL
2022-09-01 573-850 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MO 093F POPLAR BLF MO
2022-09-01 603-619 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J LACONIA NH
2022-09-01 623-343 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2022-09-01 623-462 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2022-09-01 681-683 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - WV 449F ELKINS WV
2022-09-01 727-761 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C CLEARWATER FL
2022-09-01 762-372 0XXX1XXX2XXX3XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - GA 067D SUMMERVL GA
2022-09-01 762-472 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - GA 067D LA FAYETTE GA
2022-09-01 807-200 not yet reported which blocks → Distributel 082E Clearwater Bay —
2022-09-01 807-201 not yet reported which blocks → Distributel 082E McKenzie Portage —
2022-09-01 807-203 not yet reported which blocks → Distributel 082E Oxdrift —
2022-09-01 807-205 not yet reported which blocks → Distributel 082E Perrault Falls —
2022-09-01 807-206 not yet reported which blocks → Distributel 082E Vermilion Bay —
2022-09-01 865-445 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 2 holders which blocks → ONVOY, LLC - TN 525E JEFFERSNCY TN
2022-09-01 910-972 none assigned yet which blocks → TWC IP ENABLED SERVICES, LLC 793K CYPRESSCRK NC
2022-09-01 915-318 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C FABENS TX
2022-09-01 943-469 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - GA 067D SENOIA GA
2022-08-31 234-355 0XXX3XXX5XXX9XXX · 4 holders which blocks → AT&T - LOCAL 7421 MARLBORO OH
2022-08-31 251-571 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AL 604E BAYMINETTE AL
2022-08-31 480-918 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H PHOENIX AZ
2022-08-31 602-874 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H PHOENIX AZ
2022-08-31 623-324 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H PHOENIX AZ
2022-08-31 689-282 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H ORLANDO FL
2022-08-31 689-283 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C REEDYCREEK FL
2022-08-31 726-256 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C SANANTONIO TX
2022-08-31 727-617 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C HUDSON FL
2022-08-31 727-717 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C NWPTRICHEY FL
2022-08-31 757-863 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 SUFFOLK VA
2022-08-31 804-623 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA 7238 REEDVILLE VA
2022-08-31 901-716 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TN 525E SOMERVILLE TN
2022-08-31 917-419 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
2022-08-31 989-363 1XXX2XXX3XXX4XXX5XXX7XXX · 3 holders which blocks → NUSO, LLC 732J MERRILL MI
2022-08-30 253-434 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WA 483E PUYALLUP WA
2022-08-30 301-301 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MD 876D GAITHERSBG MD
2022-08-30 445-257 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN39 PA

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.