NumberResearch Membership · Data 09/28/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
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
2019-10-01 680-217 0–9 XXXall 10 · 7 holders which blocks → VONAGE AMERICA LLC 197D UTICA NY
2019-10-01 731-600 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 8 holders which blocks → ONVOY, LLC - TN 525E MCKENZIE TN
2019-10-01 803-887 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - SC 548E LAKE WYLIE SC
2019-10-01 873-304 not yet reported which blocks → Bell Canada 8050 Temiscaming —
2019-10-01 873-305 not yet reported which blocks → Bell Canada 8050 Grenville —
2019-10-01 901-460 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - TN 525E WESTWHITEV TN
2019-10-01 901-464 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MEMPHIS TN
2019-10-01 901-676 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TN 525E LAGRANGE TN
2019-10-01 959-233 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CT 639C ESSEX CT
2019-09-30 206-586 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SEATTLE WA
2019-09-30 213-397 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2019-09-30 213-466 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2019-09-30 213-475 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 MONTEBELLO CA
2019-09-30 219-327 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - IN 097D LOWELL IN
2019-09-30 219-419 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D WANATAH IN
2019-09-30 219-912 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D LAKE VLG IN
2019-09-30 229-600 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - GA 067D COLQUITT GA
2019-09-30 254-550 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H WACO TX
2019-09-30 309-381 0–9 XXXall 10 · 2 holders which blocks → VONAGE AMERICA LLC 197D GALESBURG IL
2019-09-30 325-274 0–9 XXXall 10 · 5 holders which blocks → TAYLOR TELEPHONE COOP, INC. DBA TAYLOR TELECOM 474J ABILENE TX
2019-09-30 346-398 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 HOUSTON TX
2019-09-30 425-521 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 EVERETT WA
2019-09-30 470-537 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - GA 8392 ATLANTA NW GA
2019-09-30 628-269 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 SAN RAFAEL CA
2019-09-30 631-990 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → AIRUS, INC. - NY 363H BAY SHORE NY
2019-09-30 706-916 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - GA 067D TENNGA GA
2019-09-30 720-672 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2019-09-30 774-397 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → AIRUS, INC. - MA 428H STURBRIDGE MA
2019-09-30 815-859 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D ROCHELLE IL
2019-09-30 978-718 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → AIRUS, INC. - MA 428H ASHBURNHAM MA
2019-09-27 208-607 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 IDAHOFALLS ID
2019-09-27 213-464 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 12 CA
2019-09-27 332-215 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
2019-09-27 470-506 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 ATLANTA NE GA
2019-09-27 510-216 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2019-09-27 659-300 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → ONVOY, LLC - AL 604E BERRY AL
2019-09-27 659-400 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AL 604E JEMISON AL
2019-09-27 659-500 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → ONVOY, LLC - AL 604E PHILCMPBLL AL
2019-09-27 659-600 0XXX1XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - AL 604E SURFSIDE AL
2019-09-27 659-800 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - AL 604E VERNON AL
2019-09-27 681-300 0XXX which blocks → VONAGE AMERICA LLC 197D PRINCETON WV
2019-09-26 236-380 not yet reported which blocks → Bell Mobility 6574 Abbotsford —
2019-09-26 308-305 0XXX1XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 PAXTON NE
2019-09-26 308-306 0XXX1XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 WALLACE NE
2019-09-26 352-649 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C CITRA FL
2019-09-26 681-402 1XXX2XXX3XXX4XXX5XXX · 2 holders which blocks → ONVOY, LLC - WV 449F WORTHINGTN WV
2019-09-26 825-807 not yet reported which blocks → Iristel Inc. 154E Claresholm —
2019-09-26 825-808 not yet reported which blocks → Iristel Inc. 154E Fox Creek —
2019-09-26 825-809 not yet reported which blocks → Iristel Inc. 154E Grande Cache —
2019-09-25 202-301 0–9 XXXwhole prefix which blocks → ONVOY, LLC - DC 850D WSHNGTNZN1 DC

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.