NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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, all time — NPA 669
T-MOBILE USA, INC. 45
ONVOY, LLC - CA 43
FRACTEL, LLC 30
NEW CINGULAR WIRELESS PCS, LLC 21
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 18
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
2016-09-21 669-213 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 SNJS NORTH CA
2016-09-21 669-283 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNJS WEST CA
2016-09-21 669-284 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNJS NORTH CA
2016-09-20 669-214 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SNJS NORTH CA
2016-09-19 669-212 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNJS WEST CA
2016-09-02 669-282 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 CAMPBELL CA
2016-08-30 669-278 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CAMPBELL CA
2016-08-29 669-208 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LOS GATOS CA
2016-08-29 669-209 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SAN MARTIN CA
2016-08-29 669-210 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNJS WEST CA
2016-08-23 669-268 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CAMPBELL CA
2016-07-27 669-207 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SNJS SOUTH CA
2016-06-27 669-206 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C SUNNYVALE CA
2016-06-24 669-205 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - CA 649C GILROY CA
2016-04-01 669-204 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SNJS WEST CA
2016-03-09 669-203 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 CAMPBELL CA
2016-02-15 669-377 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C MORGANHILL CA
2016-01-13 669-770 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C SNJS NORTH CA
2015-12-17 669-230 0–9 XXXall 10 · 6 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L SNJS WEST CA
2015-11-20 669-201 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C SNJS WEST CA
2015-11-20 669-202 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C SNJS SOUTH CA
2015-11-17 669-275 0–9 XXXall 10 · 7 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L SNJS SOUTH CA
2015-11-13 669-274 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNJS SOUTH CA
2015-10-05 669-272 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SNJS WEST CA
2015-10-05 669-273 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CAMPBELL CA
2015-09-04 669-267 0–9 XXXall 10 · 4 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L SARATOGA CA
2015-08-31 669-265 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SNJS NORTH CA
2015-08-27 669-261 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SNJS NORTH CA
2015-06-26 669-255 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNJS SOUTH CA
2015-06-26 669-294 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CAMPBELL CA
2015-06-02 669-218 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNJS WEST CA
2015-05-20 669-264 0–9 XXXall 10 · 3 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L SUNNYVALE CA
2015-04-24 669-263 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNJS NORTH CA
2015-04-21 669-262 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CAMPBELL CA
2015-03-25 669-350 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C SNJS SOUTH CA
2015-01-13 669-251 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CAMPBELL CA
2014-12-24 669-258 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MORGANHILL CA
2014-12-18 669-257 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SAN MARTIN CA
2014-12-11 669-248 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SUNNYVALE CA
2014-12-05 669-256 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SARATOGA CA
2014-12-05 669-276 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNJS WEST CA
2014-11-25 669-327 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 GILROY CA
2014-11-21 669-266 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C SNJS WEST CA
2014-11-18 669-292 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C SNJS WEST CA
2014-11-10 669-244 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SNJS WEST CA
2014-10-20 669-247 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SNJS NORTH CA
2014-10-20 669-254 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CAMPBELL CA
2014-10-16 669-252 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS NORTH CA
2014-09-23 669-246 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C SUNNYVALE CA
2014-09-22 669-241 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SUNNYVALE CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.