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
2022-10-03 225-497 0–9 XXXall 10 · 4 holders which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2022-10-03 253-402 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 AUBURN WA
2022-10-03 279-228 0–9 XXXall 10 · 4 holders which blocks → RACE TELECOMMUNICATIONS, INC. - CA 973E SCRM MAIN CA
2022-10-03 309-917 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → NUSO, LLC 732J PEORIA IL
2022-10-03 315-518 0–9 XXXall 10 · 3 holders which blocks → PEERING HUB, INC. - NY 818H SYRACUSE NY
2022-10-03 346-594 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J BARKER TX
2022-10-03 347-212 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN14 NY
2022-10-03 347-347 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN14 NY
2022-10-03 347-516 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC- NY 384C NWYRCYZN03 NY
2022-10-03 416-584 not yet reported which blocks → IXICA Communications Inc. 812H Toronto —
2022-10-03 447-240 0XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LA HARPE IL
2022-10-03 458-290 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 KLAMATHFLS OR
2022-10-03 501-528 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 MALVERN AR
2022-10-03 509-296 0XXX1XXX2XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 PULLMAN WA
2022-10-03 530-874 0XXX1XXX2XXX · 3 holders which blocks → RACE TELECOMMUNICATIONS, INC. - CA 973E WILLIAMS CA
2022-10-03 530-920 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → RACE TELECOMMUNICATIONS, INC. - CA 973E GRVY MAIN CA
2022-10-03 564-235 3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 BUCKLEY WA
2022-10-03 564-262 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LONGVIEW WA
2022-10-03 585-649 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E ROCHESTER NY
2022-10-03 613-468 not yet reported which blocks → IXICA Communications Inc. 812H Ottawa-Hull —
2022-10-03 615-706 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CARTHAGE TN
2022-10-03 629-281 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 NASHVILLE TN
2022-10-03 669-324 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CAMPBELL CA
2022-10-03 672-338 not yet reported which blocks → Fido Solutions Inc. 5643 Vancouver —
2022-10-03 672-558 not yet reported which blocks → Fido Solutions Inc. 5643 Vancouver —
2022-10-03 672-833 not yet reported which blocks → Fido Solutions Inc. 5643 Vancouver —
2022-10-03 672-855 not yet reported which blocks → Fido Solutions Inc. 5643 Vancouver —
2022-10-03 672-866 not yet reported which blocks → Fido Solutions Inc. 5643 Vancouver —
2022-10-03 718-718 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN05 NY
2022-10-03 737-340 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 GEORGETOWN TX
2022-10-03 772-275 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 FORTPIERCE FL
2022-10-03 779-350 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MOMENCE IL
2022-10-03 828-701 0XXX1XXX8XXX9XXX · 2 holders which blocks → PEERLESS NETWORK OF NORTH CAROLINA, LLC - NC 350F ASHEVILLE NC
2022-10-03 830-300 0XXX3XXX6XXX8XXX · 3 holders which blocks → ONVOY, LLC - TX 903C COST TX
2022-10-03 872-320 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN10 IL
2022-10-03 940-344 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LAKEDALLAS TX
2022-10-03 956-680 0–9 XXXwhole prefix which blocks → STPCS JOINT VENTURE, LLC 4290 MISSION TX
2022-10-03 971-439 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J BEAVERTON OR
2022-10-03 971-471 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OR 750E CLACKAMAS OR
2022-09-30 228-212 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H TANNERWLMS MS
2022-09-30 279-289 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C FOLSOM CA
2022-09-30 437-599 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2022-09-30 437-799 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2022-09-30 505-542 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ESPANOLA NM
2022-09-30 505-868 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 GALLUP NM
2022-09-30 506-615 not yet reported which blocks → Iristel Inc. 154E Campbellton —
2022-09-30 509-746 0–9 XXXall 10 · 5 holders which blocks → UNITED STATES CELLULAR - WA 6270 YAKIMA WA
2022-09-30 515-515 0–9 XXXwhole prefix which blocks → ONVOY, LLC - IA 221F FORT DODGE IA
2022-09-30 605-605 0–9 XXXwhole prefix which blocks → ONVOY, LLC - SD 162G ABERDEEN SD
2022-09-30 681-446 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J MARTINSBG WV

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.