NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 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
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
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
2022-05-27 308-264 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NORTHPEETZ NE
2022-05-27 346-558 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 RICHMNRNBG TX
2022-05-27 386-335 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FLAGLERBCH FL
2022-05-27 424-622 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H CMTN CMTN CA
2022-05-27 431-245 not yet reported which blocks → RFNow Inc. 346G Baldur —
2022-05-27 431-320 not yet reported which blocks → RFNow Inc. 346G Swan Lake —
2022-05-27 505-523 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
2022-05-27 559-764 0–9 XXXall 10 · 3 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MADERA CA
2022-05-27 582-213 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOALSBURG PA
2022-05-27 626-563 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PSDN PSDN CA
2022-05-27 626-601 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LA PUENTE CA
2022-05-27 629-277 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NASHVILLE TN
2022-05-27 657-590 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2022-05-27 657-593 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2022-05-27 657-595 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2022-05-27 657-596 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2022-05-27 669-786 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SNJS SOUTH CA
2022-05-27 731-292 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 PARIS TN
2022-05-27 737-323 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LEANDER TX
2022-05-27 737-324 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LEANDER TX
2022-05-27 858-318 0XXX1XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CHULAVISTA CA
2022-05-27 910-731 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ROCKINGHAM NC
2022-05-27 971-430 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 PORTLAND OR
2022-05-26 213-681 0–9 XXXall 10 · 3 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LSAN DA 07 CA
2022-05-26 240-928 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MYERSVILLE MD
2022-05-26 249-289 not yet reported which blocks → Fibernetics Corporation 464D Biscotasing —
2022-05-26 249-304 not yet reported which blocks → Fibernetics Corporation 464D Cartier —
2022-05-26 249-305 not yet reported which blocks → Fibernetics Corporation 464D Chapleau —
2022-05-26 249-312 not yet reported which blocks → Fibernetics Corporation 464D Dubreuilville —
2022-05-26 249-314 not yet reported which blocks → Fibernetics Corporation 464D Estaire —
2022-05-26 279-229 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM MAIN CA
2022-05-26 442-371 0–9 XXXall 10 · 5 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PALMDESERT CA
2022-05-26 442-381 0–9 XXXall 10 · 6 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J INDIO CA
2022-05-26 530-610 0–9 XXXall 10 · 3 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J REDDING CA
2022-05-26 559-218 0–9 XXXall 10 · 3 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FRESNO CA
2022-05-26 619-803 0–9 XXXall 10 · 6 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG SNDG CA
2022-05-26 619-812 0–9 XXXall 10 · 3 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LA JOLLA CA
2022-05-26 661-595 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BKFD MAIN CA
2022-05-26 661-687 0–9 XXXall 10 · 5 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BKFD SOUTH CA
2022-05-26 669-315 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS NORTH CA
2022-05-26 805-809 0–9 XXXall 10 · 3 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ARROYOGRND CA
2022-05-26 805-872 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PASOROBLES CA
2022-05-26 870-851 0XXX7XXX · 2 holders which blocks → E. RITTER COMMUNICATIONS, LLC 128L CRAWFODSVL AR
2022-05-26 870-889 0XXX1XXX2XXX3XXX7XXX8XXX · 6 holders which blocks → E. RITTER COMMUNICATIONS, LLC 128L HUGHES AR
2022-05-26 870-891 0XXX1XXX2XXX7XXX · 4 holders which blocks → E. RITTER COMMUNICATIONS, LLC 128L NEWARK AR
2022-05-26 907-416 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AK 9413 ANCHORAGE AK
2022-05-25 251-394 0–9 XXXwhole prefix which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 MOBILE AL
2022-05-25 334-849 0–9 XXXall 10 · 4 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 OPELIKA AL
2022-05-25 431-948 not yet reported which blocks → Bell Mobility 6574 Winnipeg —
2022-05-25 474-351 not yet reported which blocks → Bell Mobility 6574 Saskatoon —

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.