NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2018-06-18 236-605 not yet reported which blocks → Iristel Inc. 154E Abbotsford —
2018-06-18 548-486 not yet reported which blocks → Iristel Inc. 154E London —
2018-06-18 581-710 not yet reported which blocks → Iristel Inc. 154E Quebec —
2018-06-18 607-608 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H BINGHAMTON NY
2018-06-18 716-919 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H BUFFALO NY
2018-06-18 845-850 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H POUGHKEPSI NY
2018-06-18 917-938 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H NWYRCYZN01 NY
2018-06-18 979-261 0XXX1XXX2XXX3XXX4XXX8XXX · 4 holders which blocks → VONAGE AMERICA LLC 197D LA GRANGE TX
2018-06-15 218-337 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → VONAGE AMERICA LLC 197D DULUTH MN
2018-06-15 318-656 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 SHREVEPORT LA
2018-06-15 320-371 0XXX1XXX2XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → VONAGE AMERICA LLC 197D ST CLOUD MN
2018-06-15 469-489 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 WILMER TX
2018-06-15 469-490 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2018-06-15 507-701 0–9 XXXall 10 · 3 holders which blocks → VONAGE AMERICA LLC 197D ROCHESTER MN
2018-06-15 518-917 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H ALBANY NY
2018-06-15 579-306 not yet reported which blocks → Distributel 083E Laval-Est —
2018-06-15 579-307 not yet reported which blocks → Distributel 083E Laval-Ouest —
2018-06-15 579-308 not yet reported which blocks → Distributel 083E St-Vincent-de-Paul —
2018-06-15 579-309 not yet reported which blocks → Distributel 083E Ste-Rose —
2018-06-15 680-600 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H SYRACUSE NY
2018-06-15 765-224 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → VONAGE AMERICA LLC 197D UNION CITY IN
2018-06-14 208-500 0–9 XXXall 10 · 6 holders which blocks → VONAGE AMERICA LLC 197D COERDALENE ID
2018-06-14 319-595 0–9 XXXall 10 · 4 holders which blocks → MCC TELEPHONY LLC 593K WATERLOO IA
2018-06-14 470-433 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E ATLANTA NE GA
2018-06-14 470-645 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E ATLANTA GA
2018-06-14 540-340 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - VA 138E WARRENTON VA
2018-06-14 563-227 0–9 XXXall 10 · 6 holders which blocks → MCC TELEPHONY OF IOWA, LLC - IA 751F DUBUQUE IA
2018-06-14 571-619 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MANASSAS VA
2018-06-14 631-313 0–9 XXXall 10 · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 ISLIP NY
2018-06-14 639-329 not yet reported which blocks → Bell Mobility 6574 Avonlea —
2018-06-14 712-639 0–9 XXXall 10 · 3 holders which blocks → VONAGE AMERICA LLC 197D SIOUX CITY IA
2018-06-14 720-926 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2018-06-14 843-942 0–9 XXXall 10 · 7 holders which blocks → VONAGE AMERICA LLC 197D FLORENCE SC
2018-06-14 928-655 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 SOMERTON AZ
2018-06-14 939-577 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2018-06-13 325-249 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → VONAGE AMERICA LLC 197D SAN ANGELO TX
2018-06-13 401-600 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H PROVIDENCE RI
2018-06-13 442-290 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D PALM SPG CA
2018-06-13 518-995 0XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC- NY 384C WILMINGTON NY
2018-06-13 581-760 not yet reported which blocks → Bell Canada 984C Saint-Agapit —
2018-06-13 612-394 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 TWINCITIES MN
2018-06-13 681-234 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 CHRLSTNZN6 WV
2018-06-13 681-297 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 PRKRSBGZN3 WV
2018-06-13 681-381 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 CHRLSTNZN3 WV
2018-06-13 681-387 0XXX1XXX3XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 CHRLSTNZN2 WV
2018-06-13 681-432 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 HNTNGTNZN1 WV
2018-06-13 681-505 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 CHRLSTNZN4 WV
2018-06-13 681-588 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PRKRSBGZN1 WV
2018-06-13 681-689 2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 HNTNGTNZN4 WV
2018-06-13 715-481 0XXX which blocks → VONAGE AMERICA LLC 197D EAU CLAIRE WI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.