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
2011-08-08 269-447 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 KALAMAZOO MI
2011-08-08 401-340 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI 6389 PROVIDENCE RI
2011-08-08 405-434 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SHAWNEE OK
2011-08-08 513-431 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-08-08 614-381 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 COLUMBUS OH
2011-08-08 848-221 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 TOMS RIVER NJ
2011-08-08 937-702 0XXX1XXX2XXX3XXX4XXX7XXX9XXX · 6 holders which blocks → CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B BEAVERCREK OH
2011-08-05 234-223 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 WARREN OH
2011-08-05 248-558 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CLARKSTON MI
2011-08-05 347-714 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN03 NY
2011-08-05 347-906 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN08 NY
2011-08-05 575-291 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F ROSWELL NM
2011-08-05 581-700 not yet reported which blocks → Iristel Inc. 154E Quebec —
2011-08-05 581-701 not yet reported which blocks → Iristel Inc. 154E Quebec —
2011-08-05 616-419 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GRAND RPDS MI
2011-08-05 705-806 not yet reported which blocks → Iristel Inc. 154E Sudbury —
2011-08-05 709-700 not yet reported which blocks → Iristel Inc. 154E St. John's —
2011-08-05 720-789 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2011-08-05 909-301 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E RIALTO CA
2011-08-05 917-283 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN12 NY
2011-08-04 321-241 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E EAU GALLIE FL
2011-08-04 321-245 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C ORLANDO FL
2011-08-04 347-201 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN14 NY
2011-08-04 347-508 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN10 NY
2011-08-04 401-327 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 PROVIDENCE RI
2011-08-04 408-214 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SAN MARTIN CA
2011-08-04 408-780 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SNJS WEST CA
2011-08-04 415-340 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SNFC MT-EV CA
2011-08-04 513-394 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-08-04 513-399 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-08-04 601-401 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MS 992E FLORA MS
2011-08-04 848-223 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 TOMS RIVER NJ
2011-08-04 919-891 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E PRINCETON NC
2011-08-03 226-936 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Leamington —
2011-08-03 226-970 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Tillsonburg —
2011-08-03 228-200 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C HURLEY MS
2011-08-03 270-935 0–9 XXXall 10 · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 BOWLNGGREN KY
2011-08-03 604-239 not yet reported which blocks → Iristel Inc. 154E New Westminster —
2011-08-03 613-504 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Pembroke —
2011-08-03 613-701 not yet reported which blocks → Iristel Inc. 154E Ottawa-Hull —
2011-08-03 705-433 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Midland —
2011-08-03 843-593 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - SC 077F BEAUFORT SC
2011-08-03 931-253 0–9 XXXall 10 · 6 holders which blocks → TENNESSEE TEL. CO. 0575 WAYNESBORO TN
2011-08-03 985-275 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C SOUTHOSYKA LA
2011-08-02 225-447 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 BATONROUGE LA
2011-08-02 253-448 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2011-08-02 312-448 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN01 IL
2011-08-02 312-459 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2011-08-02 501-444 0XXX1XXX2XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-08-02 681-340 0–9 XXXall 10 · 3 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 CHRLSTNZN1 WV

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.