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
2018-03-28 365-453 not yet reported which blocks → Distributel 082E Wellandport —
2018-03-28 365-454 not yet reported which blocks → Distributel 082E Welland —
2018-03-28 365-458 not yet reported which blocks → Distributel 082E Ridgeway —
2018-03-28 365-459 not yet reported which blocks → Distributel 082E Stevensville —
2018-03-28 365-460 not yet reported which blocks → Distributel 082E Wainfleet —
2018-03-28 480-408 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2018-03-28 480-504 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2018-03-28 551-260 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 JERSEYCITY NJ
2018-03-28 669-229 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNJS WEST CA
2018-03-28 727-274 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 NWPTRICHEY FL
2018-03-28 850-852 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - FL 937C MONTICELLO FL
2018-03-27 223-848 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 YORK PA
2018-03-27 236-767 not yet reported which blocks → TELUS 8086 Winfield —
2018-03-27 236-789 not yet reported which blocks → TELUS 8086 Chetwynd —
2018-03-27 252-989 0XXX9XXX · 2 holders which blocks → VONAGE AMERICA LLC 197D ENGELHARD NC
2018-03-27 365-446 not yet reported which blocks → Distributel 082E Cayuga —
2018-03-27 365-447 not yet reported which blocks → Distributel 082E Niagara Falls —
2018-03-27 365-448 not yet reported which blocks → Distributel 082E Niagara-On-The-Lake —
2018-03-27 365-449 not yet reported which blocks → Distributel 082E Pelham —
2018-03-27 365-450 not yet reported which blocks → Distributel 082E Port Robinson —
2018-03-27 365-455 not yet reported which blocks → Distributel 082E Fisherville —
2018-03-27 365-456 not yet reported which blocks → Distributel 082E Fort Erie —
2018-03-27 365-457 not yet reported which blocks → Distributel 082E Port Colborne —
2018-03-27 531-466 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D OMAHA NE
2018-03-27 628-273 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2018-03-27 628-274 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2018-03-27 628-275 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2018-03-27 716-403 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC- NY 384C TONAWANDA NY
2018-03-27 782-321 not yet reported which blocks → Bragg Communications Inc. 421G Halifax —
2018-03-27 828-630 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D ARDEN NC
2018-03-27 980-448 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NC 638E GASTONIA NC
2018-03-26 202-655 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - DC 6117 WSHNGTNZN1 DC
2018-03-26 209-695 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PATTERSON CA
2018-03-26 234-243 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D WARREN OH
2018-03-26 270-666 0–9 XXXall 10 · 6 holders which blocks → VONAGE AMERICA LLC 197D HOPKINSVL KY
2018-03-26 346-329 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2018-03-26 360-762 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 LONGVIEW WA
2018-03-26 385-367 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - UT 871E CLEARFIELD UT
2018-03-26 417-907 0XXX9XXX · 2 holders which blocks → VONAGE AMERICA LLC 197D GALENA MO
2018-03-26 682-269 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
2018-03-26 709-219 not yet reported which blocks → TELUS Mobility 8303 St. John's —
2018-03-26 775-433 0–9 XXXall 10 · 3 holders which blocks → VONAGE AMERICA LLC 197D RENO NV
2018-03-26 785-993 0XXX which blocks → VONAGE AMERICA LLC 197D CIRCLEVL KS
2018-03-26 803-953 0–9 XXXall 10 · 5 holders which blocks → SOUTH CAROLINA NET, INC. - SC 1784 MANNING SC
2018-03-26 805-902 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SOMIS CA
2018-03-26 806-631 1XXX2XXX6XXX7XXX9XXX · 3 holders which blocks → VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 1163 RALLS TX
2018-03-26 873-243 not yet reported which blocks → Videotron Ltd. 8306 Warwick —
2018-03-26 937-519 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D DAYTON OH
2018-03-26 949-942 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D NEWPORTBCH CA
2018-03-26 972-942 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 DALLAS TX

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.