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
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.