NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2002-09-20 949-690 4XXX which blocks → T-MOBILE USA, INC. 6529 SADLBK VLY CA
2002-09-20 949-701 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 IRVINE CA
2002-09-20 949-742 3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 TRABUCO CA
2002-09-20 949-903 7XXX which blocks → T-MOBILE USA, INC. 6529 NEWPORTBCH CA
2002-09-19 209-502 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 RIVERBANK CA
2002-09-19 209-542 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 HUGHSON CA
2002-09-19 209-676 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 ATWATER CA
2002-09-19 209-764 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → T-MOBILE USA, INC. 6529 OAKDALE CA
2002-09-19 224-293 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → ILLINOIS BELL TEL CO 9329 DUNDEE IL
2002-09-19 228-261 6XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 GULFPORT MS
2002-09-19 252-505 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 PLYMOUTH NC
2002-09-19 252-506 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 GATESVILLE NC
2002-09-19 252-507 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 ROANOKERPD NC
2002-09-19 252-508 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WILLIAMSTN NC
2002-09-19 252-509 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINDSOR NC
2002-09-19 252-548 2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ELIZABTHCY NC
2002-09-19 252-648 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 MOREHEADCY NC
2002-09-19 252-649 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 NEW BERN NC
2002-09-19 270-971 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 LEITCHFLD KY
2002-09-19 270-972 2XXX7XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 LEBANON KY
2002-09-19 270-973 1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 GREENSBURG KY
2002-09-19 270-974 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 COLUMBIA KY
2002-09-19 270-975 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 BROWNSVL KY
2002-09-19 323-350 not yet reported which blocks → T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2002-09-19 323-788 not yet reported which blocks → T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2002-09-19 360-860 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KINGSTON WA
2002-09-19 360-861 0–9 XXXall 10 · 6 holders which blocks → UNITED STATES CELLULAR - WA 6270 ELMA WA
2002-09-19 408-429 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 CAMPBELL CA
2002-09-19 415-612 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 IGNACIO CA
2002-09-19 415-690 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 BELVEDERE CA
2002-09-19 502-512 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 TAYLORSVL KY
2002-09-19 502-513 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J SHELBYVL KY
2002-09-19 502-514 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 OWENTON KY
2002-09-19 502-517 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 LAWRENCEBG KY
2002-09-19 502-518 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J EMINENCE KY
2002-09-19 502-519 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 CARROLLTON KY
2002-09-19 509-643 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SUNNYSIDE WA
2002-09-19 510-213 4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2002-09-19 510-417 1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2002-09-19 510-672 5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RICHMOND CA
2002-09-19 510-717 7XXX which blocks → T-MOBILE USA, INC. 6529 OKLD BKLY CA
2002-09-19 540-238 0XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ROCKYMOUNT VA
2002-09-19 559-813 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 FOWLER CA
2002-09-19 559-940 1XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 CLOVIS CA
2002-09-19 559-942 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 CARUTHERS CA
2002-09-19 606-467 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → WINDSTREAM KENTUCKY EAST, INC. - LEXINGTON 9690 ASHLAND KY
2002-09-19 619-519 3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 CORONADO CA
2002-09-19 626-715 not yet reported which blocks → T-MOBILE USA, INC. 6529 LA PUENTE CA
2002-09-19 626-731 4XXX5XXX6XXX7XXX which blocks → T-MOBILE USA, INC. 6529 SNGBLCNN CA
2002-09-19 626-841 4XXX5XXX6XXX7XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 MONROVIA CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.