NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
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
2013-01-21 867-496 not yet reported which blocks → Bell Mobility 6574 Fort Good Hope —
2013-01-21 984-221 0–9 XXXall 10 · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 RALEIGH NC
2013-01-18 267-368 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 PHLDLPHZN3 PA
2013-01-18 267-678 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 PHLDLPHZN2 PA
2013-01-18 510-598 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 FRNK MAIN CA
2013-01-18 540-680 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WARRENTON VA
2013-01-18 571-620 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G WSNGTNZN17 VA
2013-01-18 867-490 not yet reported which blocks → Bell Mobility 6574 Tsiigehtchic —
2013-01-18 867-491 not yet reported which blocks → Bell Mobility 6574 Jean Marie River —
2013-01-18 867-492 not yet reported which blocks → Bell Mobility 6574 Behchoko —
2013-01-17 202-830 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN1 DC
2013-01-17 219-323 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 CROWNPOINT IN
2013-01-17 226-371 not yet reported which blocks → TELUS Integrated Communications 2782 Courtright —
2013-01-17 226-372 not yet reported which blocks → TELUS Integrated Communications 2782 Oil Springs —
2013-01-17 234-315 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CORTLAND OH
2013-01-17 234-318 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CORTLAND OH
2013-01-17 234-321 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 GREENSBURG OH
2013-01-17 234-331 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MARLBORO OH
2013-01-17 234-337 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CORTLAND OH
2013-01-17 234-361 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 GREENSBURG OH
2013-01-17 289-459 not yet reported which blocks → Distributel 082E Thornhill —
2013-01-17 289-568 not yet reported which blocks → TELUS Integrated Communications 2782 Binbrook —
2013-01-17 469-475 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2013-01-17 720-638 0–9 XXXwhole prefix which blocks → COMCAST IP PHONE, LLC 318J DENVER CO
2013-01-17 774-410 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 FRAMINGHAM MA
2013-01-17 774-412 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 FRAMINGHAM MA
2013-01-17 828-440 0XXX1XXX2XXX3XXX4XXX7XXX9XXX · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K TRYON NC
2013-01-17 832-819 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2013-01-17 832-857 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOUSTON TX
2013-01-17 919-292 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K SANFORD NC
2013-01-17 971-309 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 WILLAMINA OR
2013-01-16 210-716 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANANTONIO TX
2013-01-16 334-623 0–9 XXXall 10 · 7 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K WEST POINT AL
2013-01-16 586-332 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2013-01-16 606-446 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → INTER MOUNTAIN CABLE DBA MIKROTEC COMMUNICATIONS 2623 CUMBERLAND KY
2013-01-16 727-998 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C HUDSON FL
2013-01-15 217-904 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 551G CHAMPAURBN IL
2013-01-15 218-214 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 BEMIDJI MN
2013-01-15 224-401 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ALGONQUIN IL
2013-01-15 224-404 0–9 XXXall 10 · 7 holders which blocks → ILLINOIS BELL TEL CO 9329 ELK GROVE IL
2013-01-15 229-421 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 THOMASVL GA
2013-01-15 269-225 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 PLAINWELL MI
2013-01-15 314-278 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
2013-01-15 314-526 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 KIRKWOOD MO
2013-01-15 317-760 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN
2013-01-15 385-207 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 PROVO UT
2013-01-15 404-430 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2013-01-15 469-470 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LEWISVILLE TX
2013-01-15 516-590 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN09 NY
2013-01-15 571-424 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.