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
2018-11-20 639-439 not yet reported which blocks → Access Communications Co-operative Limited 280H Rosthern —
2018-11-20 639-441 not yet reported which blocks → Access Communications Co-operative Limited 280H Saskatoon —
2018-11-20 639-442 not yet reported which blocks → Access Communications Co-operative Limited 280H Wakaw —
2018-11-20 639-443 not yet reported which blocks → Access Communications Co-operative Limited 280H Watrous —
2018-11-20 747-285 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SUNLD TJNG CA
2018-11-20 769-239 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 MENDENHALL MS
2018-11-19 205-360 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F ODENVILLE AL
2018-11-19 208-506 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - ID 7558 BOISE ID
2018-11-19 308-251 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 KEARNEY NE
2018-11-19 443-774 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 COLUMBIA MD
2018-11-19 484-783 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 BOYERTOWN PA
2018-11-19 534-444 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - WI 225C EAU CLAIRE WI
2018-11-19 786-644 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E KEYS FL
2018-11-19 925-412 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CONCORD CA
2018-11-19 971-345 0–9 XXXall 10 · 7 holders which blocks → AIRESPRING, INC. 996H SALEM OR
2018-11-16 251-572 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E FRISCOCITY AL
2018-11-16 412-516 0–9 XXXall 10 · 5 holders which blocks → AIRESPRING, INC. 996H PTGSBNZN22 PA
2018-11-16 585-575 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC- NY 384C HONEOYE NY
2018-11-16 585-595 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC- NY 384C HEMLOCK NY
2018-11-16 680-208 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E CATO NY
2018-11-15 309-590 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC 224C BLOOMINGTN IL
2018-11-15 361-337 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - TX 903C BERCLAIR TX
2018-11-15 361-338 0XXX2XXX3XXX4XXX5XXX8XXX · 2 holders which blocks → ONVOY, LLC - TX 903C CHARCO TX
2018-11-15 361-344 0XXX1XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - TX 903C PAWNEE TX
2018-11-15 571-401 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2018-11-15 639-238 not yet reported which blocks → Access Communications Co-operative Limited 280H Creighton —
2018-11-15 737-253 0–9 XXXall 10 · 3 holders which blocks → VONAGE AMERICA LLC 197D GEORGETOWN TX
2018-11-15 757-970 0–9 XXXwhole prefix which blocks → VONAGE AMERICA LLC 197D NRFOLKZON2 VA
2018-11-15 775-799 0–9 XXXall 10 · 6 holders which blocks → HD CARRIER LLC 321J RENO NV
2018-11-15 814-962 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F CLEARFIELD PA
2018-11-15 825-467 not yet reported which blocks → TELUS 8084 Edmonton —
2018-11-15 913-350 0–9 XXXwhole prefix which blocks → VONAGE AMERICA LLC 197D KANSASCITY KS
2018-11-15 913-914 0–9 XXXwhole prefix which blocks → ONVOY, LLC - KS 205F KANSASCITY KS
2018-11-15 956-539 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D LAREDO TX
2018-11-14 205-350 0–9 XXXall 10 · 2 holders which blocks → VONAGE AMERICA LLC 197D BESSEMER AL
2018-11-14 407-561 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 ORLANDO FL
2018-11-14 516-760 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN02 NY
2018-11-14 581-863 not yet reported which blocks → Videotron Ltd. 8306 Chateau-Richer —
2018-11-14 667-257 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D COLUMBIA MD
2018-11-14 667-258 0–9 XXXall 10 · 2 holders which blocks → AIRESPRING, INC. 996H BALTIMORE MD
2018-11-14 786-642 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2018-11-13 208-910 0–9 XXXall 10 · 2 holders which blocks → VONAGE AMERICA LLC 197D NAMPA ID
2018-11-13 216-260 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D TERRACE OH
2018-11-13 225-269 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F TUNICA LA
2018-11-13 225-430 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F DONALDSNVL LA
2018-11-13 234-264 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D YOUNGSTOWN OH
2018-11-13 236-427 not yet reported which blocks → TELUS 8086 Vancouver —
2018-11-13 262-256 0XXX1XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - WI 007F DELAFIELD WI
2018-11-13 308-937 0XXX3XXX6XXX7XXX · 2 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K HILDRETH NE
2018-11-13 352-579 0–9 XXXwhole prefix which blocks → VONAGE AMERICA LLC 197D OCALA FL

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.