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
2020-11-09 669-348 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H SUNNYVALE CA
2020-11-03 669-946 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SNJS SOUTH CA
2020-10-26 669-304 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 MORGANHILL CA
2020-10-19 669-303 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNJS SOUTH CA
2020-09-17 669-465 3XXX4XXX5XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H SANANTONIO CA
2020-09-16 669-336 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H CAMPBELL CA
2020-07-31 669-302 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CAMPBELL CA
2020-07-10 669-732 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H SUNNYVALE CA
2020-07-02 669-345 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H GILROY CA
2020-07-02 669-356 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H LOS GATOS CA
2020-05-19 669-301 0–9 XXXall 10 · 6 holders which blocks → VONAGE AMERICA LLC 197D SNJS SOUTH CA
2020-01-15 669-279 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CAMPBELL CA
2019-11-04 669-299 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 SNJS WEST CA
2019-09-13 669-298 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SARATOGA CA
2019-09-06 669-297 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SNJS NORTH CA
2019-08-19 669-296 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SNJS SOUTH CA
2019-06-14 669-295 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SNJS WEST CA
2019-05-28 669-291 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LOS GATOS CA
2019-04-19 669-289 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CAMPBELL CA
2019-03-20 669-529 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SUNNYVALE CA
2019-03-20 669-696 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H SNJS WEST CA
2019-03-19 669-699 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SNJS SOUTH CA
2019-03-11 669-288 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNJS WEST CA
2019-03-11 669-305 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E GILROY CA
2019-02-13 669-219 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MORGANHILL CA
2019-02-08 669-269 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SARATOGA CA
2019-02-08 669-270 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E MORGANHILL CA
2019-02-08 669-280 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SAN MARTIN CA
2019-01-30 669-260 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNJS NORTH CA
2019-01-18 669-290 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SUNNYVALE CA
2019-01-18 669-309 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SNJS SOUTH CA
2018-12-03 669-259 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C SARATOGA CA
2018-11-29 669-250 0–9 XXXall 10 · 3 holders which blocks → VONAGE AMERICA LLC 197D SNJS WEST CA
2018-09-14 669-240 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 LOS GATOS CA
2018-04-09 669-467 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 SUNNYVALE CA
2018-03-28 669-229 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNJS WEST CA
2018-02-12 669-277 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SUNNYVALE CA
2018-02-07 669-313 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 CAMPBELL CA
2017-12-21 669-293 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SNJS NORTH CA
2017-12-14 669-249 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SUNNYVALE CA
2017-07-19 669-239 0–9 XXXall 10 · 8 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 GILROY CA
2017-06-27 669-454 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SUNNYVALE CA
2017-06-08 669-217 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNJS WEST CA
2017-05-25 669-544 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SNJS NORTH CA
2017-03-24 669-216 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 SNJS SOUTH CA
2017-03-13 669-287 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SNJS WEST CA
2017-03-10 669-286 0–9 XXXall 10 · 8 holders which blocks → T-MOBILE USA, INC. 6529 MORGANHILL CA
2017-02-21 669-281 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SNJS WEST CA
2016-11-07 669-215 0–9 XXXall 10 · 8 holders which blocks → T-MOBILE USA, INC. 6529 SUNNYVALE CA
2016-09-26 669-285 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 SNJS SOUTH 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.