NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
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
2011-11-15 224-209 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ALGONQUIN IL
2011-11-15 226-721 not yet reported which blocks → Primus Telecommunications Canada Inc. 201A London —
2011-11-15 314-299 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2011-11-15 314-357 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2011-11-15 314-459 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2011-11-15 352-218 0–9 XXXall 10 · 3 holders which blocks → WINDSTREAM FLORIDA, INC. 0336 MELROSE FL
2011-11-15 352-309 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → WINDSTREAM FLORIDA, INC. 0336 BROOKER FL
2011-11-15 352-878 3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → WINDSTREAM FLORIDA, INC. 0336 MCINTOSH FL
2011-11-15 386-217 0–9 XXXall 10 · 4 holders which blocks → WINDSTREAM FLORIDA, INC. 0336 LAKEBUTLER FL
2011-11-15 386-224 0–9 XXXall 10 · 3 holders which blocks → WINDSTREAM FLORIDA, INC. 0336 INTERLACHN FL
2011-11-15 386-300 0–9 XXXall 10 · 4 holders which blocks → WINDSTREAM FLORIDA, INC. 0336 FORT WHITE FL
2011-11-15 405-508 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2011-11-15 405-695 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 SHAWNEE OK
2011-11-15 405-839 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2011-11-15 469-276 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 IRVING TX
2011-11-15 587-275 not yet reported which blocks → Shaw Telecom Inc. 497E Fort McMurray —
2011-11-15 618-202 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ANNA IL
2011-11-15 647-812 not yet reported which blocks → ISP Telecom Inc. 4727 Toronto —
2011-11-15 647-813 not yet reported which blocks → ISP Telecom Inc. 4727 Toronto —
2011-11-15 647-814 not yet reported which blocks → ISP Telecom Inc. 4727 Toronto —
2011-11-15 647-815 not yet reported which blocks → ISP Telecom Inc. 4727 Toronto —
2011-11-15 647-816 not yet reported which blocks → ISP Telecom Inc. 4727 Toronto —
2011-11-15 647-817 not yet reported which blocks → ISP Telecom Inc. 4727 Toronto —
2011-11-15 709-320 not yet reported which blocks → Bell Mobility Aliant 329A St. Lawrence —
2011-11-15 787-980 0–9 XXXall 10 · 2 holders which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J CAROLINA PR
2011-11-15 828-578 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 HICKORY NC
2011-11-15 860-837 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J HARTFORD CT
2011-11-15 904-267 0–9 XXXall 10 · 5 holders which blocks → WINDSTREAM FLORIDA, INC. 0336 HILLIARD FL
2011-11-15 904-320 0–9 XXXall 10 · 5 holders which blocks → WINDSTREAM FLORIDA, INC. 0336 CALLAHAN FL
2011-11-14 267-449 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 PHLDLPHZN2 PA
2011-11-14 270-523 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C UTICA KY
2011-11-14 270-593 0XXX1XXX2XXX3XXX7XXX · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C SACRAMENTO KY
2011-11-14 270-616 0XXX2XXX3XXX7XXX · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C W LOUISVL KY
2011-11-14 270-794 0XXX1XXX7XXX · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C SORGHO KY
2011-11-14 303-515 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CO 026D DENVER CO
2011-11-14 317-434 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 CUMBERLAND IN
2011-11-14 318-551 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 MONROE LA
2011-11-14 320-301 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - MN 184D MONTEVIDEO MN
2011-11-14 404-698 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA GA
2011-11-14 404-904 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2011-11-14 470-514 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NE GA
2011-11-14 478-294 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 MARSHALLVL GA
2011-11-14 479-240 0XXX2XXX3XXX4XXX · 4 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 ELKINS AR
2011-11-14 501-331 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 PERRYVILLE AR
2011-11-14 501-402 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 6 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 GREENBRIER AR
2011-11-14 703-523 0–9 XXXwhole prefix which blocks → COMCAST IP PHONE, LLC 318J DALE CITY VA
2011-11-14 808-369 0–9 XXXall 10 · 6 holders which blocks → SERVPAC INCORPORATED - HI 517G HONOLULU HI
2011-11-14 918-927 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2011-11-14 985-202 0–9 XXXall 10 · 5 holders which blocks → HUNT TELECOMMUNICATIONS, LLC - LA 181D MADISONVL LA
2011-11-11 240-754 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WALDORF MD

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.