NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2018-12-11 223-216 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → METROPCS, INC. 5562 LANDISVL PA
2018-12-11 431-822 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Winkler —
2018-12-11 437-867 not yet reported which blocks → Iristel Inc. 154E Toronto —
2018-12-11 438-530 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2018-12-11 581-980 not yet reported which blocks → Videotron Ltd. 328F Quebec —
2018-12-11 605-800 0–9 XXXall 10 · 6 holders which blocks → TERRA NOVA TELECOM INC. 145J SIOUX FLS SD
2018-12-11 628-270 0–9 XXXall 10 · 2 holders which blocks → SONIC TELECOM, LLC - CA 433E SNFC MT-EV CA
2018-12-11 667-653 0–9 XXXall 10 · 5 holders which blocks → CORE COMMUNICATIONS, INC.- MD 2593 BRYNPKLNCM MD
2018-12-11 681-600 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WV 449F CLARKSBURG WV
2018-12-11 906-257 0–9 XXXwhole prefix which blocks → ONVOY, LLCV - MI 543C CRYSTALFLS MI
2018-12-10 470-431 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E BOWDON GA
2018-12-10 667-326 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CORE COMMUNICATIONS, INC.- MD 2593 CHURCHHILL MD
2018-12-10 667-843 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → CORE COMMUNICATIONS, INC.- MD 2593 DEALISLAND MD
2018-12-10 804-635 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 POWHATAN VA
2018-12-10 878-225 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E ELLWOOD CY PA
2018-12-10 878-257 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - PA 547E TAYLORSTN PA
2018-12-07 463-219 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D ACTON IN
2018-12-07 463-220 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D SHERIDAN IN
2018-12-07 470-454 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - GA 8392 ATLANTA GA
2018-12-07 540-859 0XXX1XXX3XXX5XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 GORDONSVL VA
2018-12-07 715-500 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - WI 225C NEWRICHMND WI
2018-12-07 814-400 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - PA 547E BELLEFONTE PA
2018-12-07 845-740 5XXX which blocks → TVC ALBANY, INC. DBA FIRSTLIGHT FIBER 7989 POUGHKEPSI NY
2018-12-07 865-348 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 KNOXVILLE TN
2018-12-07 878-217 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 CRIDERSCOR PA
2018-12-06 302-485 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WILMINGTON DE
2018-12-06 302-486 0–9 XXXwhole prefix which blocks → VONAGE AMERICA LLC 197D NEWARK DE
2018-12-06 307-207 0–9 XXXall 10 · 3 holders which blocks → AIRUS, INC. - WY 581H LAKE WY
2018-12-06 315-881 0XXX1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E MORAVIA NY
2018-12-06 425-620 0–9 XXXall 10 · 3 holders which blocks → VONAGE AMERICA LLC 197D BELLEVUE WA
2018-12-06 469-588 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 FRISCO TX
2018-12-06 540-417 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - VA 138E MCGAHEYSVL VA
2018-12-06 579-537 not yet reported which blocks → Videotron Ltd. 8306 Bedford —
2018-12-06 579-538 not yet reported which blocks → Videotron Ltd. 8306 Lacolle —
2018-12-06 605-827 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → VALLEY COMMUNICATIONS, INC. D/B/A VALLEY FIBERCOM 363J VOLGA SD
2018-12-06 657-368 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 WESTMINSTR CA
2018-12-06 862-337 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 CHATHAM NJ
2018-12-06 909-701 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 UPLAND CA
2018-12-06 959-206 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D HARTFORD CT
2018-12-05 224-296 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC 224C EVANSTON IL
2018-12-05 224-298 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC 224C GRAYSLAKE IL
2018-12-05 229-596 0–9 XXXall 10 · 3 holders which blocks → PINELAND COMMUNICATIONS, INC. - GA 458G AMERICUS GA
2018-12-05 262-731 0–9 XXXall 10 · 6 holders which blocks → VONAGE AMERICA LLC 197D WHITEWATER WI
2018-12-05 331-249 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC 224C NAPERVILLE IL
2018-12-05 430-248 not yet reported which blocks → SHELCOMM 0051 GREENVILLE TX
2018-12-05 440-581 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 ELYRIA OH
2018-12-05 534-344 0–9 XXXwhole prefix which blocks → ONVOY, LLC - WI 225C WHITEHALL WI
2018-12-05 534-544 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - WI 225C HUDSON WI
2018-12-05 628-264 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2018-12-05 682-280 not yet reported which blocks → SHELCOMM 0051 FORT WORTH TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.