NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2019-02-21 647-480 not yet reported which blocks → Zayo Canada Inc. 8304 Toronto —
2019-02-21 680-214 0–9 XXXall 10 · 5 holders which blocks → EXIANT COMMUNICATIONS LLC 114J SYRACUSE NY
2019-02-21 716-493 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → EXIANT COMMUNICATIONS LLC 114J BUFFALO NY
2019-02-21 781-882 0XXX1XXX2XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - MA 892D MARSHFIELD MA
2019-02-21 838-207 0–9 XXXall 10 · 4 holders which blocks → EXIANT COMMUNICATIONS LLC 114J ALBANY NY
2019-02-21 929-520 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN09 NY
2019-02-21 938-900 0–9 XXXall 10 · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J HUNTSVILLE AL
2019-02-21 949-507 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 IRVINE CA
2019-02-21 949-508 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E IRVINE CA
2019-02-21 949-519 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SADLBK VLY CA
2019-02-21 959-210 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WILLIMNTIC CT
2019-02-21 985-600 0–9 XXXall 10 · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J BUSH LA
2019-02-20 219-312 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D VALPARAISO IN
2019-02-20 469-604 0–9 XXXall 10 · 4 holders which blocks → SOUTHWESTERN BELL 9533 FRISCO TX
2019-02-20 539-900 0–9 XXXall 10 · 2 holders which blocks → TERRA NOVA TELECOM INC. 145J TULSA OK
2019-02-20 580-900 0XXX9XXX which blocks → TERRA NOVA TELECOM INC. 145J TUPELO OK
2019-02-20 581-940 not yet reported which blocks → Videotron Ltd. 8306 Leeds —
2019-02-20 581-941 not yet reported which blocks → Videotron Ltd. 8306 Inverness —
2019-02-20 581-943 not yet reported which blocks → Videotron Ltd. 8306 Stratford —
2019-02-20 667-264 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 DELMAR MD
2019-02-20 667-900 0–9 XXXall 10 · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J BALTIMORE MD
2019-02-20 813-946 0–9 XXXall 10 · 5 holders which blocks → CORETEL FLORIDA, INC. - FL 481F PLANT CITY FL
2019-02-20 848-900 0–9 XXXall 10 · 6 holders which blocks → TERRA NOVA TELECOM INC. 145J ASBURYPARK NJ
2019-02-20 854-900 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J CHARLESTON SC
2019-02-20 864-666 0–9 XXXall 10 · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J GREENVILLE SC
2019-02-20 904-490 0–9 XXXall 10 · 6 holders which blocks → EXIANT COMMUNICATIONS LLC 114J JACKSONVL FL
2019-02-20 928-500 0–9 XXXall 10 · 2 holders which blocks → TERRA NOVA TELECOM INC. 145J AGUILA AZ
2019-02-20 984-275 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E RALEIGH NC
2019-02-20 984-302 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 RALEIGH NC
2019-02-19 256-817 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HUNTSVILLE AL
2019-02-19 276-242 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GRUNDY VA
2019-02-19 386-435 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CORETEL FLORIDA, INC. - FL 481F DOWLING PK FL
2019-02-19 431-327 not yet reported which blocks → Bell West Inc. 2933 Ste. Rose du Lac —
2019-02-19 431-461 not yet reported which blocks → Bell West Inc. 2933 Arborg —
2019-02-19 431-462 not yet reported which blocks → Bell West Inc. 2933 Easterville —
2019-02-19 431-463 not yet reported which blocks → Bell West Inc. 2933 Fisher River —
2019-02-19 431-464 not yet reported which blocks → Bell West Inc. 2933 Gimli —
2019-02-19 431-465 not yet reported which blocks → Bell West Inc. 2933 Lac Du Bonnet —
2019-02-19 431-466 not yet reported which blocks → Bell West Inc. 2933 Pine Falls —
2019-02-19 431-467 not yet reported which blocks → Bell West Inc. 2933 Winnipeg Beach —
2019-02-19 431-678 not yet reported which blocks → Bell West Inc. 2933 Stony Mountain —
2019-02-19 520-376 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 SIERRAVIST AZ
2019-02-19 530-608 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 TRUCKEE CA
2019-02-19 540-716 0XXX1XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEXINGTON VA
2019-02-19 609-697 0XXX1XXX2XXX3XXX4XXX6XXX7XXX · 3 holders which blocks → CORETEL NEW JERSEY, INC. - NJ 482F HOPEWELL NJ
2019-02-19 682-289 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 EULESS TX
2019-02-19 786-829 0–9 XXXall 10 · 3 holders which blocks → CORETEL FLORIDA, INC. - FL 481F HOMESTEAD FL
2019-02-19 878-219 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J FARMINGTON PA
2019-02-19 912-406 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - GA 8392 WAYCROSS GA
2019-02-19 912-645 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - GA 8392 SAVANNAH GA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.