NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

357 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
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 27
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
2011-03-02 865-200 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 KNOXVILLE TN
2011-03-02 901-600 0–9 XXXwhole prefix which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 MEMPHIS TN
2011-03-02 931-896 0–9 XXXall 10 · 7 holders which blocks → POWERTEL NASHVILLE LICENSES, INC. 7476 CLARKSVL TN
2011-03-02 954-674 0–9 XXXall 10 · 4 holders which blocks → DIGITALIPVOICE, INC. - FL 520F HOLLYWOOD FL
2011-03-01 234-265 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C SALINEVL OH
2011-03-01 289-423 not yet reported which blocks → TELUS Mobility 8303 Ajax-Pickering —
2011-03-01 318-500 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 MARKSVILLE LA
2011-03-01 323-413 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2011-03-01 343-263 not yet reported which blocks → TELUS Mobility 8303 Belleville —
2011-03-01 423-398 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 KINGSPORT TN
2011-03-01 567-296 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C UPSANDUSKY OH
2011-03-01 587-218 not yet reported which blocks → TELUS Mobility 8301 Killam —
2011-03-01 630-491 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E ELMHURST IL
2011-03-01 702-825 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F SEARCHLIHT NV
2011-03-01 702-983 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F SANDY VLY NV
2011-03-01 705-808 not yet reported which blocks → Videotron Ltd. 383F Peterborough —
2011-03-01 819-305 not yet reported which blocks → Telecommunications Xittel Inc 247F Maniwaki —
2011-03-01 832-304 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F DEER PARK TX
2011-03-01 848-200 0–9 XXXall 10 · 6 holders which blocks → BLOCK LINE SYSTEMS, LLC - NJ 835E METUCHEN NJ
2011-03-01 862-621 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 BLOOMFIELD NJ
2011-03-01 903-600 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F RICE TX
2011-03-01 971-600 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F SALEM OR
2011-03-01 971-800 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F MILL CITY OR
2011-02-28 262-955 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 WAUKESHA WI
2011-02-28 579-888 not yet reported which blocks → TELUS Mobility 8303 St-Jerome —
2011-02-28 587-253 not yet reported which blocks → TELUS Mobility 8301 Medicine Hat —
2011-02-28 705-462 not yet reported which blocks → Bragg Communications Inc. 4878 Kirkland Lake —
2011-02-28 705-469 not yet reported which blocks → Bragg Communications Inc. 4878 Swastika —
2011-02-28 902-213 not yet reported which blocks → TELUS Mobility 8303 Charlottetown —
2011-02-28 919-214 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SILER CITY NC
2011-02-25 201-464 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F HACKENSACK NJ
2011-02-25 229-429 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MOULTRIE GA
2011-02-25 267-428 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 PHLDLPHZN3 PA
2011-02-25 269-331 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 HASTINGS MI
2011-02-25 347-807 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN08 NY
2011-02-25 347-883 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN03 NY
2011-02-25 360-836 0–9 XXXall 10 · 5 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 VANCOUVER WA
2011-02-25 414-366 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2011-02-25 424-272 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 SNMN SNMN CA
2011-02-25 504-800 0–9 XXXall 10 · 6 holders which blocks → VOICESTREAM GSM I, LLC 150C KENNER LA
2011-02-25 513-568 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-02-25 585-626 0–9 XXXall 10 · 5 holders which blocks → FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 WEBSTER NY
2011-02-25 636-385 0–9 XXXall 10 · 6 holders which blocks → BRIGHTSPEED OF MISSOURI, LLC 9787 OFALLON MO
2011-02-25 732-813 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F FREEHOLD NJ
2011-02-25 902-614 not yet reported which blocks → Bragg Communications Inc. 421G Amherst —
2011-02-25 914-294 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 WSCHSTZN01 NY
2011-02-24 208-956 0XXX9XXX · 2 holders which blocks → ONVOY, LLC - ID 689F COERDALENE ID
2011-02-24 269-332 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BENTON HBR MI
2011-02-24 301-200 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MD 071F INDIANHEAD MD
2011-02-24 450-404 not yet reported which blocks → Telecommunications Xittel Inc 247F Joliette —

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.