NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
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
2011-06-30 443-913 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-06-30 579-720 not yet reported which blocks → Videotron Ltd. 8306 St-Lambert —
2011-06-30 587-254 not yet reported which blocks → TELUS 8084 Airdrie —
2011-06-30 615-455 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C SCUNNINGHA TN
2011-06-30 681-238 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 BECKLEY WV
2011-06-30 708-759 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-06-30 720-354 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 TELECOM OF COLORADO, LLC - CO 4574 DENVER CO
2011-06-30 819-500 not yet reported which blocks → Videotron Ltd. 328F Gatineau —
2011-06-30 856-352 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J BLACKWOOD NJ
2011-06-30 856-516 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J WILLIAMSTN NJ
2011-06-30 856-839 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J VINELAND NJ
2011-06-30 872-484 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2011-06-29 205-440 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 BIRMINGHAM AL
2011-06-29 216-882 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2011-06-29 240-585 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WALDORF MD
2011-06-29 323-426 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2011-06-29 407-960 0–9 XXXall 10 · 2 holders which blocks → BHN IP ENABLED SERVICES, LLC 045L WINTERPARK FL
2011-06-29 424-276 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E W ANGELES CA
2011-06-29 442-242 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D VICTORVL CA
2011-06-29 443-908 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2011-06-29 506-390 not yet reported which blocks → Bell Mobility Aliant 329A St. Leonard —
2011-06-29 581-987 not yet reported which blocks → Videotron Ltd. 328F Baie-Comeau (Hauterive) —
2011-06-29 647-467 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2011-06-29 647-468 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2011-06-29 647-469 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2011-06-29 702-757 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LAUGHLIN NV
2011-06-29 705-393 not yet reported which blocks → ExaTEL Inc. 3147 Barrie —
2011-06-29 819-992 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Trois-Rivieres —
2011-06-29 917-736 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J NWYRCYZN03 NY
2011-06-29 949-527 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J IRVINE CA
2011-06-27 314-358 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2011-06-27 470-331 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 WINDER GA
2011-06-27 480-535 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2011-06-27 616-329 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GRAND RPDS MI
2011-06-27 678-751 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA NE GA
2011-06-23 567-222 not yet reported which blocks → ARMSTRONG TELECOMMUNICATIONS, INC. - OH 024E SHILOH OH
2011-06-23 567-285 not yet reported which blocks → ARMSTRONG TELECOMMUNICATIONS, INC. - OH 024E ADARIO OH
2011-06-23 705-982 not yet reported which blocks → Bragg Communications Inc. 4878 Lindsay —
2011-06-23 778-710 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Vancouver —
2011-06-23 778-712 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Vancouver —
2011-06-23 778-713 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Vancouver —
2011-06-23 778-714 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Vancouver —
2011-06-23 864-364 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 SENECA SC
2011-06-23 973-521 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F CALDWELL NJ
2011-06-22 336-912 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 GREENSBORO NC
2011-06-22 347-918 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF NEW YORK, LLC - NY 155E NWYRCYZN03 NY
2011-06-22 347-919 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF NEW YORK, LLC - NY 155E NWYRCYZN05 NY
2011-06-22 425-366 0–9 XXXall 10 · 6 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 EVERETT WA
2011-06-22 501-272 0XXX1XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-06-22 504-249 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 NEWORLEANS LA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.