NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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
2012-03-08 581-643 not yet reported which blocks → Videotron Ltd. 8306 Chute-aux-Outardes —
2012-03-08 615-979 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 NASHVILLE TN
2012-03-08 615-999 0–9 XXXwhole prefix which blocks → POWERTEL NASHVILLE LICENSES, INC. 7476 NASHVILLE TN
2012-03-08 816-548 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KANSASCITY MO
2012-03-08 857-248 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2012-03-08 857-260 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2012-03-08 865-210 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 KNOXVILLE TN
2012-03-08 901-208 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 MEMPHIS TN
2012-03-08 918-889 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
2012-03-07 405-763 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OKLA CITY OK
2012-03-07 406-702 0–9 XXXall 10 · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K BILLINGS MT
2012-03-07 581-327 not yet reported which blocks → Videotron Ltd. 8306 Tadoussac —
2012-03-07 604-425 not yet reported which blocks → Distributel 081E Abbotsford —
2012-03-07 604-426 not yet reported which blocks → Distributel 081E Chilliwack —
2012-03-07 614-666 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F HILLIARD OH
2012-03-07 724-500 0XXX1XXX3XXX4XXX5XXX7XXX · 6 holders which blocks → WINDSTREAM PENNSYLVANIA, INC. 0176 NEWALXNDRI PA
2012-03-07 724-999 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → WINDSTREAM PENNSYLVANIA, INC. 0176 JAMESTOWN PA
2012-03-07 778-738 not yet reported which blocks → Distributel 081E Kelowna —
2012-03-07 778-739 not yet reported which blocks → Distributel 081E Osoyoos —
2012-03-07 778-740 not yet reported which blocks → Distributel 081E Peachland —
2012-03-07 778-741 not yet reported which blocks → Distributel 081E Westbank —
2012-03-07 867-322 not yet reported which blocks → Iristel Inc. 154E Whitehorse —
2012-03-07 867-888 not yet reported which blocks → Iristel Inc. 154E Inuvik —
2012-03-07 867-988 not yet reported which blocks → Iristel Inc. 154E Yellowknife —
2012-03-07 954-900 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM, INC. - FL 382G FTLAUDERDL FL
2012-03-07 979-206 0XXX which blocks → ONVOY, LLC - TX 903C LA GRANGE TX
2012-03-06 219-267 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F CEDAR LAKE IN
2012-03-06 289-499 not yet reported which blocks → Fibernetics Corporation 464D Brampton —
2012-03-06 312-509 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN01 IL
2012-03-06 331-210 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E ST CHARLES IL
2012-03-06 385-985 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2012-03-06 587-772 not yet reported which blocks → Distributel 081E Edmonton —
2012-03-06 604-449 not yet reported which blocks → Distributel 081E Vancouver —
2012-03-06 702-956 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LAS VEGAS NV
2012-03-06 720-627 0–9 XXXall 10 · 5 holders which blocks → QWEST CORPORATION 9636 DENVER CO
2012-03-06 772-333 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM, INC. - FL 382G PTST LUCIE FL
2012-03-06 779-202 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 GALENA IL
2012-03-06 971-303 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2012-03-05 253-888 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F TACOMA WA
2012-03-05 269-459 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7157 KALAMAZOO MI
2012-03-05 336-717 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NC 8389 STONEVILLE NC
2012-03-05 402-803 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEWARD NE
2012-03-05 404-618 0–9 XXXall 10 · 2 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2012-03-05 425-777 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F BELLEVUE WA
2012-03-05 435-355 0–9 XXXall 10 · 5 holders which blocks → EMERY TELECOMMUNICATIONS & VIDEO, INC. - UT 683H MOAB UT
2012-03-05 480-999 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F PHOENIX AZ
2012-03-05 513-620 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CINCINNATI OH
2012-03-05 520-415 0–9 XXXall 10 · 7 holders which blocks → MCC TELEPHONY LLC 593K NOGALES AZ
2012-03-05 567-310 not yet reported which blocks → ARMSTRONG TELECOMMUNICATIONS, INC. - OH 024E SULLIVAN OH
2012-03-05 575-424 2XXX4XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NM 5470 VIRDEN NM

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.