NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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 26
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
2011-04-04 587-725 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Red Earth —
2011-04-04 657-216 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E PLACENTIA CA
2011-04-04 720-442 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F LONGMONT CO
2011-04-04 720-689 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F DENVER CO
2011-04-04 747-201 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BRBN BRBN CA
2011-04-04 760-993 0–9 XXXall 10 · 5 holders which blocks → FRONTIER CALIFORNIA INC. 2319 DSERTHTSPG CA
2011-04-04 769-300 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J MADISON MS
2011-04-04 785-450 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → HOME COMMUNICATIONS, INC. - KS 906E LINDSBORG KS
2011-04-04 805-335 0–9 XXXall 10 · 6 holders which blocks → FRONTIER CALIFORNIA INC. 2319 SANBARBARA CA
2011-04-04 819-501 not yet reported which blocks → Videotron Ltd. 8306 Compton —
2011-04-04 819-502 not yet reported which blocks → Videotron Ltd. 8306 Coaticook —
2011-04-04 819-553 not yet reported which blocks → Videotron Ltd. 8306 Sawyerville —
2011-04-04 936-899 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 LUFKIN TX
2011-04-04 971-266 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 PORTLAND OR
2011-04-01 289-412 not yet reported which blocks → TELUS Integrated Communications 2782 Milton —
2011-04-01 289-413 not yet reported which blocks → TELUS Integrated Communications 2782 Niagara-On-The-Lake —
2011-04-01 289-414 not yet reported which blocks → TELUS Integrated Communications 2782 Welland —
2011-04-01 343-212 not yet reported which blocks → TELUS Integrated Communications 2782 Jockvale —
2011-04-01 343-370 not yet reported which blocks → TELUS Mobility 8303 Cornwall —
2011-04-01 347-916 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K NWYRCYZN06 NY
2011-04-01 720-551 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DENVER CO
2011-04-01 720-644 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J DENVER CO
2011-04-01 813-279 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 TAMPANTH FL
2011-04-01 917-745 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K NWYRCYZN08 NY
2011-04-01 917-830 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K NWYRCYZN14 NY
2011-03-31 306-988 not yet reported which blocks → Iristel Inc. 154E Regina —
2011-03-31 614-398 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F COLUMBUS OH
2011-03-31 630-731 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 AURORA IL
2011-03-31 708-200 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-03-31 902-795 not yet reported which blocks → Bragg Communications Inc. 4878 Cardigan —
2011-03-30 226-925 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 London —
2011-03-30 226-926 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 London —
2011-03-30 226-928 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 London —
2011-03-30 302-259 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 GEORGETOWN DE
2011-03-30 307-425 not yet reported which blocks → ADVANCED COMMUNICATIONS TECHNOLOGY, INC. - WY 268A BUFFALO WY
2011-03-30 423-999 0–9 XXXall 10 · 3 holders which blocks → POWERTEL NASHVILLE LICENSES, INC. 7476 ATHENS TN
2011-03-29 201-877 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 CLIFFSIDE NJ
2011-03-29 423-405 0–9 XXXall 10 · 6 holders which blocks → POWERTEL NASHVILLE LICENSES, INC. 7476 ATHENS TN
2011-03-29 443-741 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 COLUMBIA MD
2011-03-29 575-488 not yet reported which blocks → TULAROSA COMMUNICATIONS, INC. - NM 470G ALAMOGORDO NM
2011-03-29 623-387 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2011-03-29 747-200 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BRBN BRBN CA
2011-03-29 760-979 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 BARSTOW CA
2011-03-28 205-400 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 BIRMINGHAM AL
2011-03-28 205-800 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 BESSEMER AL
2011-03-28 407-990 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 ORLANDO FL
2011-03-28 530-500 0–9 XXXall 10 · 6 holders which blocks → SNOWCREST TELEPHONE, INC -CA 103G DUNSMUIR CA
2011-03-28 580-321 not yet reported which blocks → CROSS-VALLIANT CELLULAR PARTNERSHIP 387E RATTAN OK
2011-03-28 580-424 not yet reported which blocks → CROSS-VALLIANT CELLULAR PARTNERSHIP 387E HUGO OK
2011-03-28 580-955 not yet reported which blocks → CROSS-VALLIANT CELLULAR PARTNERSHIP 387E ANTLERS OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.