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
2017-09-25 726-999 0–9 XXXall 10 · 6 holders which blocks → USFON, INC. - TX 473F SANANTONIO TX
2017-09-22 213-319 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2017-09-22 229-808 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 DOERUN GA
2017-09-22 240-569 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MD 071F FLINTSTONE MD
2017-09-22 346-274 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2017-09-22 413-291 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H SPRINGFLD MA
2017-09-22 418-709 not yet reported which blocks → TELUS Mobility 8303 Riviere-du-Loup —
2017-09-22 431-557 not yet reported which blocks → TELUS Mobility 8303 Winnipeg —
2017-09-22 437-637 not yet reported which blocks → Iristel Inc. 154E Toronto —
2017-09-22 463-777 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D INDIANAPLS IN
2017-09-22 586-666 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C MT CLEMENS MI
2017-09-22 626-412 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E COVINA CA
2017-09-22 647-327 not yet reported which blocks → Bell Mobility 6574 Toronto —
2017-09-22 647-363 not yet reported which blocks → Iristel Inc. 154E Toronto —
2017-09-22 704-741 0–9 XXXwhole prefix which blocks → ONVOY, LLC - NC 638E CHARLOTTE NC
2017-09-22 706-785 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E HOGANSVL GA
2017-09-22 713-814 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2017-09-22 762-475 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E GIBSON GA
2017-09-22 778-536 not yet reported which blocks → Bell Mobility 6574 Abbotsford —
2017-09-22 778-692 not yet reported which blocks → TELUS Mobility 8301 Vernon —
2017-09-22 778-694 not yet reported which blocks → TELUS Mobility 8301 South Kamloops —
2017-09-22 778-951 not yet reported which blocks → Bell Mobility 6574 Vancouver —
2017-09-22 857-298 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H CAMBRIDGE MA
2017-09-21 260-250 0–9 XXXall 10 · 3 holders which blocks → MCC TELEPHONY OF THE MID-WEST, LLC - IN 874F MONROEVL IN
2017-09-21 309-271 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC 224C PEORIA IL
2017-09-21 331-244 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC 224C NAPERVILLE IL
2017-09-21 438-505 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2017-09-21 438-522 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2017-09-21 475-338 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J BRANFORD CT
2017-09-21 757-960 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J SMITHFIELD VA
2017-09-21 862-306 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 PASSAIC NJ
2017-09-21 914-247 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 MT VERNON NY
2017-09-20 346-272 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 HOUSTON TX
2017-09-20 346-273 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TOMBALL TX
2017-09-20 442-270 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 EL CENTRO CA
2017-09-20 516-401 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 NASSAUZN02 NY
2017-09-20 628-240 0–9 XXXall 10 · 8 holders which blocks → METROPCS, INC. 5562 SAN RAFAEL CA
2017-09-20 647-901 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2017-09-20 647-904 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2017-09-20 647-906 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2017-09-20 707-209 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 VALLEJO CA
2017-09-20 737-228 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2017-09-20 786-492 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 KEYS FL
2017-09-20 859-551 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 TELECOM OF KENTUCKY, LLC - KY 7260 LEXINGTON KY
2017-09-19 343-249 not yet reported which blocks → TELUS Integrated Communications 2782 Athens —
2017-09-19 343-250 not yet reported which blocks → TELUS Integrated Communications 2782 Cardinal —
2017-09-19 343-251 not yet reported which blocks → TELUS Integrated Communications 2782 Delta —
2017-09-19 365-208 not yet reported which blocks → TELUS Integrated Communications 2782 Cayuga —
2017-09-19 365-209 not yet reported which blocks → TELUS Integrated Communications 2782 Dunnville —
2017-09-19 463-206 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN

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.