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
2018-03-15 747-277 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NO HOLLYWD CA
2018-03-15 747-389 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D NO HOLLYWD CA
2018-03-15 781-531 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEEDHAM MA
2018-03-15 873-240 not yet reported which blocks → Videotron Ltd. 8306 Trois-Rivieres —
2018-03-15 873-241 not yet reported which blocks → Videotron Ltd. 8306 Arthabaska —
2018-03-15 873-242 not yet reported which blocks → Videotron Ltd. 8306 Victoriaville —
2018-03-15 909-955 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D RIALTO CA
2018-03-15 939-588 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2018-03-15 939-625 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2018-03-14 213-677 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 07 CA
2018-03-14 479-329 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ALMA AR
2018-03-14 515-823 0–9 XXXall 10 · 2 holders which blocks → VONAGE AMERICA LLC 197D DES MOINES IA
2018-03-14 530-829 0XXX1XXX4XXX8XXX9XXX · 5 holders which blocks → VONAGE AMERICA LLC 197D CHICO CA
2018-03-14 575-733 0XXX1XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F RATON NM
2018-03-14 661-741 0–9 XXXall 10 · 2 holders which blocks → VONAGE AMERICA LLC 197D BKFD MAIN CA
2018-03-14 838-288 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E SHARON SPG NY
2018-03-14 854-854 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - SC 548E MYRTLE BCH SC
2018-03-14 873-224 not yet reported which blocks → TELUS Quebec 2243 Labelle —
2018-03-14 873-225 not yet reported which blocks → TELUS Quebec 2243 L'Annonciation —
2018-03-14 873-226 not yet reported which blocks → TELUS Quebec 2243 St-Adolphe-D'Howard —
2018-03-14 873-227 not yet reported which blocks → TELUS Quebec 2243 St-Donat-de-Montcalm —
2018-03-14 873-228 not yet reported which blocks → TELUS Quebec 2243 Ste-Agathe —
2018-03-14 873-229 not yet reported which blocks → TELUS Quebec 2243 St-Faustin —
2018-03-14 873-230 not yet reported which blocks → TELUS Quebec 2243 St-Jovite —
2018-03-14 873-231 not yet reported which blocks → TELUS Quebec 2243 Val David —
2018-03-14 915-264 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F EL PASO TX
2018-03-13 225-416 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D BATONROUGE LA
2018-03-13 251-283 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D MOBILE AL
2018-03-13 254-342 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D WACO TX
2018-03-13 309-327 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D PEORIA IL
2018-03-13 318-642 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VONAGE AMERICA LLC 197D SHREVEPORT LA
2018-03-13 320-636 1XXX2XXX8XXX · 3 holders which blocks → TEKSTAR COMMUNICATIONS, INC. 4156 SOUTHHAVEN MN
2018-03-13 323-814 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2018-03-13 323-955 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 13 CA
2018-03-13 323-990 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2018-03-13 334-604 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D MONTGOMERY AL
2018-03-13 337-399 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → VONAGE AMERICA LLC 197D LAFAYETTE LA
2018-03-13 346-324 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2018-03-13 361-257 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D C CHRISTI TX
2018-03-13 430-240 0–9 XXXall 10 · 7 holders which blocks → VONAGE AMERICA LLC 197D LONGVIEW TX
2018-03-13 484-460 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 ALLENTOWN PA
2018-03-13 510-929 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E OKLD MN-PD CA
2018-03-13 548-388 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 London —
2018-03-13 548-588 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 London —
2018-03-13 548-788 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 London —
2018-03-13 613-672 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Kanata-Stittsville —
2018-03-13 631-508 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 RIVERHEAD NY
2018-03-13 639-802 not yet reported which blocks → Iristel Inc. 154E Moosomin —
2018-03-13 657-522 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E YORBALINDA CA
2018-03-13 762-716 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - GA 067D AUGUSTA GA

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.