NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 21
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
2015-01-28 865-888 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TN 525E KNOXVILLE TN
2015-01-28 904-580 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 JACKSONVL FL
2015-01-28 980-999 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NC 638E CHARLOTTE NC
2015-01-27 210-951 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SANANTONIO TX
2015-01-27 262-333 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WI 225C WAUKESHA WI
2015-01-27 336-999 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NC 638E WINSTN SAL NC
2015-01-27 469-664 0–9 XXXall 10 · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K FRISCO TX
2015-01-27 469-754 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J DALLAS TX
2015-01-27 561-530 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 WPALMBEACH FL
2015-01-27 626-342 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ALHAMBRA CA
2015-01-27 629-777 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TN 525E NASHVILLE TN
2015-01-27 803-615 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - SC 077F EDGEFIELD SC
2015-01-27 804-999 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - VA 138E RICHMOND VA
2015-01-27 832-839 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 HOUSTON TX
2015-01-27 845-224 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TC SYSTEMS, INC. - NY 7140 POUGHKEPSI NY
2015-01-27 901-610 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 COLLIERVL TN
2015-01-27 920-777 0–9 XXXwhole prefix which blocks → ONVOY, LLC - WI 225C GREEN BAY WI
2015-01-27 959-777 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CT 639C HARTFORD CT
2015-01-27 959-888 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CT 639C HARTFORD CT
2015-01-26 313-985 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN3 MI
2015-01-26 346-216 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 BAYTOWN TX
2015-01-26 423-712 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F BLUFF CITY TN
2015-01-26 469-850 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F FRISCO TX
2015-01-26 469-914 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C DALLAS TX
2015-01-26 608-688 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - WI 007F COTTAGEGRV WI
2015-01-26 660-570 0–9 XXXall 10 · 5 holders which blocks → NETGENUITY INC. 356H SEDALIA MO
2015-01-26 660-771 0XXX1XXX6XXX · 3 holders which blocks → MIDWEST DATA CENTER, INC. - MO 454H MARYVILLE MO
2015-01-26 717-937 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F SCHAEFESTN PA
2015-01-26 901-616 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F ARLINGTON TN
2015-01-26 956-609 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 EDINBURG TX
2015-01-23 208-817 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - ID 192F EMMETT ID
2015-01-23 256-907 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F BOAZ AL
2015-01-23 407-449 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KISSIMMEE FL
2015-01-23 407-785 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 KISSIMMEE FL
2015-01-23 415-604 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SNFC JUNPR CA
2015-01-23 424-387 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 SNMN SNMN CA
2015-01-23 469-769 0–9 XXXall 10 · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K ROCKWALL TX
2015-01-23 475-655 0–9 XXXall 10 · 7 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2015-01-23 540-495 0XXX1XXX5XXX8XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F CALVERTON VA
2015-01-23 540-883 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F MIDDLEBURG VA
2015-01-23 562-336 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LONG BEACH CA
2015-01-23 571-635 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2015-01-23 585-524 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 BATAVIA NY
2015-01-23 619-635 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 EL CAJON CA
2015-01-23 631-933 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 AMITYVILLE NY
2015-01-23 914-893 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 WSCHSTZN01 NY
2015-01-23 928-985 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F SAFFORD AZ
2015-01-22 318-460 0–9 XXXall 10 · 6 holders which blocks → HUNT TELECOMMUNICATIONS, LLC - LA 181D MONROE LA
2015-01-22 337-603 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 EUNICE LA
2015-01-22 385-248 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PROVO UT

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.