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
2016-05-30 236-741 not yet reported which blocks → Navigata Communications Limited 078G Hazelton —
2016-05-30 236-742 not yet reported which blocks → Navigata Communications Limited 078G Houston —
2016-05-30 236-743 not yet reported which blocks → Navigata Communications Limited 078G Kincolith —
2016-05-27 236-219 not yet reported which blocks → Navigata Communications Limited 078G Ashcroft —
2016-05-27 236-220 not yet reported which blocks → Navigata Communications Limited 078G Aspen Park —
2016-05-27 236-221 not yet reported which blocks → Navigata Communications Limited 078G Avola —
2016-05-27 236-222 not yet reported which blocks → Navigata Communications Limited 078G Barriere —
2016-05-27 236-223 not yet reported which blocks → Navigata Communications Limited 078G Cache Creek —
2016-05-27 236-224 not yet reported which blocks → Navigata Communications Limited 078G Clearwater —
2016-05-27 236-225 not yet reported which blocks → Navigata Communications Limited 078G Lillooet —
2016-05-27 236-226 not yet reported which blocks → Navigata Communications Limited 078G Little Fort —
2016-05-27 236-227 not yet reported which blocks → Navigata Communications Limited 078G Logan Lake —
2016-05-27 236-228 not yet reported which blocks → Navigata Communications Limited 078G Lytton —
2016-05-27 236-229 not yet reported which blocks → Navigata Communications Limited 078G Spences Bridge —
2016-05-27 236-230 not yet reported which blocks → Navigata Communications Limited 078G Vavenby —
2016-05-27 236-231 not yet reported which blocks → Navigata Communications Limited 078G Westwold —
2016-05-27 346-235 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C BAMMEL TX
2016-05-27 442-286 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 ESCONDIDO CA
2016-05-27 518-805 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TROY NY
2016-05-27 551-273 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NJ 637C BAYONNE NJ
2016-05-27 620-448 0–9 XXXall 10 · 7 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 PARSONS KS
2016-05-27 775-774 1XXX4XXX · 2 holders which blocks → WIDE VOICE, LLC - NV 253F COTNWD CRK NV
2016-05-27 951-430 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SUN CITY CA
2016-05-26 226-681 not yet reported which blocks → Comwave Networks 160G Walkerton —
2016-05-26 226-682 not yet reported which blocks → Comwave Networks 160G Thornbury —
2016-05-26 249-303 not yet reported which blocks → Comwave Networks 160G Chub Lake —
2016-05-26 249-404 not yet reported which blocks → Comwave Networks 160G Elliot Lake —
2016-05-26 249-515 not yet reported which blocks → Comwave Networks 160G Sturgeon Falls —
2016-05-26 343-331 not yet reported which blocks → Comwave Networks 160G Vankleek Hill —
2016-05-26 385-268 0–9 XXXall 10 · 4 holders which blocks → FIRSTDIGITAL COMMUNICATIONS, LLC 716D PROVO UT
2016-05-26 412-933 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 PTTSBGZON1 PA
2016-05-26 431-998 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Winnipeg —
2016-05-26 470-337 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA NE GA
2016-05-26 505-318 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
2016-05-26 570-354 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E SCRANTON PA
2016-05-26 662-636 0–9 XXXall 10 · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 OXFORD MS
2016-05-26 717-740 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 LANCASTER PA
2016-05-26 732-944 0–9 XXXall 10 · 3 holders which blocks → VONAGE AMERICA LLC 197D NEWBRNSWCK NJ
2016-05-26 762-224 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF GEORGIA, LLC - GA 909E AUGUSTA GA
2016-05-26 810-484 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FLINT MI
2016-05-26 816-715 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY MO
2016-05-26 929-350 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN10 NY
2016-05-25 202-866 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D WSHNGTNZN1 DC
2016-05-25 240-850 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF MARYLAND, LLC 568G HAGERSTOWN MD
2016-05-25 272-808 0–9 XXXall 10 · 6 holders which blocks → CTSI, INC. - PA 7513 WILKSBARRE PA
2016-05-25 318-731 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F VIVIAN LA
2016-05-25 325-304 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SAN ANGELO TX
2016-05-25 346-351 0–9 XXXall 10 · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K SPRING TX
2016-05-25 352-681 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 GAINESVL FL
2016-05-25 440-904 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 E CLARIDON OH

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.