NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

349 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
2011-07-15 513-391 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-07-15 540-759 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 ROANOKE VA
2011-07-15 570-334 2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → WINDSTREAM PENNSYLVANIA, INC. 0176 HUGHESVL PA
2011-07-15 570-551 0–9 XXXall 10 · 8 holders which blocks → WINDSTREAM BUFFALO VALLEY, INC. 0151 LEWISBURG PA
2011-07-15 586-359 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2011-07-15 614-290 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 COLUMBUS OH
2011-07-15 717-863 0–9 XXXall 10 · 7 holders which blocks → WINDSTREAM D&E, INC. 0165 EPHRATA PA
2011-07-15 724-793 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → WINDSTREAM PENNSYLVANIA, INC. 0176 KITTANNING PA
2011-07-15 857-250 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2011-07-15 951-331 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2011-07-14 201-250 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 HACKENSACK NJ
2011-07-14 239-227 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 NAPLES FL
2011-07-14 289-975 not yet reported which blocks → Distributel 082E Hamilton —
2011-07-14 407-250 0–9 XXXall 10 · 2 holders which blocks → BHN IP ENABLED SERVICES, LLC 045L ORLANDO FL
2011-07-14 438-490 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2011-07-14 438-897 not yet reported which blocks → Distributel 083E Montreal —
2011-07-14 438-898 not yet reported which blocks → Distributel 083E Montreal —
2011-07-14 438-899 not yet reported which blocks → Distributel 083E Montreal —
2011-07-14 504-295 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 NEWORLEANS LA
2011-07-14 514-416 not yet reported which blocks → Distributel 083E Montreal —
2011-07-14 573-553 0XXX3XXX6XXX7XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 WESTPHALIA MO
2011-07-14 581-490 not yet reported which blocks → Videotron Ltd. 328F Chicoutimi —
2011-07-14 587-400 not yet reported which blocks → Iristel Inc. 154E Edmonton —
2011-07-14 587-401 not yet reported which blocks → Iristel Inc. 154E Edmonton —
2011-07-14 587-402 not yet reported which blocks → Iristel Inc. 154E Edmonton —
2011-07-14 587-776 not yet reported which blocks → Distributel 081E Calgary —
2011-07-14 587-779 not yet reported which blocks → Distributel 081E Calgary —
2011-07-14 613-903 not yet reported which blocks → Distributel 082E Ottawa-Hull —
2011-07-14 615-926 0–9 XXXwhole prefix which blocks → POWERTEL NASHVILLE LICENSES, INC. 7476 NASHVILLE TN
2011-07-13 334-331 not yet reported which blocks → WINDSTREAM ALABAMA, INC. 0302 ECLECTIC AL
2011-07-13 587-255 not yet reported which blocks → TELUS Mobility 8301 Czar —
2011-07-13 587-256 not yet reported which blocks → TELUS Mobility 8301 Viking —
2011-07-13 587-331 not yet reported which blocks → Iristel Inc. 154E Calgary —
2011-07-13 587-332 not yet reported which blocks → Iristel Inc. 154E Calgary —
2011-07-13 609-253 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NJ 7310 FORT DIX NJ
2011-07-13 615-295 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 MURFREESBO TN
2011-07-13 647-763 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2011-07-13 662-500 0XXX1XXX3XXX4XXX5XXX7XXX · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C JONESTOWN MS
2011-07-13 778-524 not yet reported which blocks → Shaw Telecom Inc. 497E Skookumchuck —
2011-07-13 786-310 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J MIAMI FL
2011-07-13 862-257 0–9 XXXall 10 · 4 holders which blocks → CSC VOICE, LLC 612K PATERSON NJ
2011-07-13 931-250 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CROSSVILLE TN
2011-07-12 226-606 not yet reported which blocks → Videotron Ltd. 383F Kitchener-Waterloo —
2011-07-12 229-586 0–9 XXXall 10 · 5 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 TIFTON GA
2011-07-12 331-220 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 AURORA IL
2011-07-12 360-328 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J SILVERDALE WA
2011-07-12 385-229 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2011-07-12 402-975 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NE 7144 LINCOLN NE
2011-07-12 404-801 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2011-07-12 470-233 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NE GA

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.