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
2018-08-28 469-512 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PLANO TX
2018-08-28 475-685 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2018-08-28 515-690 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → IMON COMMUNICATIONS, LLC - IA 695G INDIANOLA IA
2018-08-28 571-500 0–9 XXXwhole prefix which blocks → ONVOY, LLC - VA 138E HERNDON VA
2018-08-28 712-634 0XXX2XXX4XXX5XXX6XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - IA 985E CARROLL IA
2018-08-28 774-375 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FRAMINGHAM MA
2018-08-28 814-996 0–9 XXXall 10 · 8 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 STATECOLLG PA
2018-08-28 830-272 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → EXIANT COMMUNICATIONS LLC 114J SEGUIN TX
2018-08-28 904-467 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E BALDWIN FL
2018-08-28 940-278 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F JUSTIN TX
2018-08-27 229-261 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E GEORGETOWN GA
2018-08-27 234-250 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 AKRON OH
2018-08-27 317-785 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F WESTFIELD IN
2018-08-27 319-300 0–9 XXXall 10 · 9 holders which blocks → T-MOBILE USA, INC. 6529 WATERLOO IA
2018-08-27 331-239 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC 224C YORKVILLE IL
2018-08-27 438-343 not yet reported which blocks → Bell Mobility 6574 Montreal —
2018-08-27 647-396 not yet reported which blocks → Bell Mobility 6574 Toronto —
2018-08-27 712-214 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - IA 221F ASHTON IA
2018-08-27 712-218 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IA 221F BATTLE CRK IA
2018-08-27 712-306 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - IA 221F BRUNSVILLE IA
2018-08-27 712-312 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - IA 221F PIERSON IA
2018-08-27 712-315 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - IA 221F STRUBLE IA
2018-08-27 712-316 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - IA 221F WASHTA IA
2018-08-27 779-258 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC 224C HERSCHER IL
2018-08-27 779-259 0XXX1XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC 224C MANTENO IL
2018-08-27 912-219 0–9 XXXall 10 · 6 holders which blocks → EXIANT COMMUNICATIONS LLC 114J SAVANNAH GA
2018-08-27 970-473 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 GREELEY CO
2018-08-24 223-209 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F MTHOLLYSPG PA
2018-08-24 269-247 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BENTON HBR MI
2018-08-24 330-443 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX which blocks → ONVOY, LLC - OH 464C HARTFORD OH
2018-08-24 431-895 not yet reported which blocks → Westman Media Cooperative Ltd 120F Elkhorn —
2018-08-24 458-600 0–9 XXXall 10 · 5 holders which blocks → INVOXIO INCORPORATED 158H BEND OR
2018-08-24 470-406 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA 7435 ATLANTA NE GA
2018-08-24 470-413 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA NE GA
2018-08-24 470-416 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA NE GA
2018-08-24 470-417 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA NE GA
2018-08-24 480-531 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2018-08-24 531-206 0–9 XXXall 10 · 5 holders which blocks → UNITED STATES CELLULAR - NE 6263 AINSWORTH NE
2018-08-24 551-286 0–9 XXXall 10 · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - NJ 4948 HACKENSACK NJ
2018-08-24 581-851 not yet reported which blocks → Videotron Ltd. 8306 Alma —
2018-08-24 581-852 not yet reported which blocks → Videotron Ltd. 8306 Beauceville —
2018-08-24 581-853 not yet reported which blocks → Videotron Ltd. 8306 Lac-aux-Sables —
2018-08-24 602-536 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2018-08-24 623-244 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2018-08-24 762-665 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K TALBOTTON GA
2018-08-24 864-496 0XXX which blocks → CHARTER IP ENABLED SERVICES, LLC 792K WABBEVILLE SC
2018-08-24 971-900 0–9 XXXall 10 · 6 holders which blocks → INVOXIO INCORPORATED 158H SALEM OR
2018-08-23 343-299 not yet reported which blocks → IXICA Communications Inc. 812H Cumberland —
2018-08-23 343-334 not yet reported which blocks → IXICA Communications Inc. 812H Kemptville —
2018-08-23 343-485 not yet reported which blocks → IXICA Communications Inc. 812H Merrickville —

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.