NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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 650
T-MOBILE USA, INC. 57
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
2023-10-10 650-220 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 MT VIEW CA
2023-05-08 650-661 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 PACIFICA CA
2022-09-20 650-705 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 MT VIEW CA
2022-02-28 650-698 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 PALO ALTO CA
2022-01-07 650-671 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SSNFRNCSCO CA
2021-12-14 650-609 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 MILLBRAE CA
2021-11-15 650-643 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PALO ALTO CA
2021-10-26 650-675 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 PACIFICA CA
2021-08-23 650-613 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PALO ALTO CA
2019-10-25 650-507 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 PALO ALTO CA
2018-08-08 650-420 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PACIFICA CA
2018-01-18 650-402 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 HALFMOONBY CA
2017-05-22 650-309 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 HALFMOONBY CA
2016-09-21 650-476 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 HALFMOONBY CA
2016-08-30 650-447 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 MT VIEW CA
2016-07-15 650-680 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 LOS ALTOS CA
2016-04-29 650-250 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 PALO ALTO CA
2016-01-15 650-334 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 PALO ALTO CA
2015-09-11 650-431 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SAN MATEO CA
2015-08-26 650-495 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 MT VIEW CA
2015-03-13 650-660 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 HALFMOONBY CA
2014-11-03 650-338 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 HALFMOONBY CA
2014-09-30 650-772 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 MT VIEW CA
2014-09-24 650-753 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SAN MATEO CA
2013-07-22 650-445 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 SAN MATEO CA
2002-09-19 650-305 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 LOS ALTOS CA
2002-09-19 650-440 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 HALFMOONBY CA
2002-09-19 650-861 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 MT VIEW CA
2001-12-27 650-278 4XXX5XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 SSNFRNCSCO CA
2001-12-27 650-283 1XXX which blocks → T-MOBILE USA, INC. 6529 PALO ALTO CA
2001-12-27 650-307 1XXX5XXX6XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 MILLBRAE CA
2001-12-27 650-430 not yet reported which blocks → T-MOBILE USA, INC. 6529 SAN MATEO CA
2001-04-23 650-468 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 PALO ALTO CA
— 650-201 0XXX2XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 SSNFRNCSCO CA
— 650-218 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SAN MATEO CA
— 650-219 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SSNFRNCSCO CA
— 650-222 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SAN MATEO CA
— 650-248 2XXX which blocks → T-MOBILE USA, INC. 6529 PALO ALTO CA
— 650-270 0XXX2XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 SSNFRNCSCO CA
— 650-274 0XXX which blocks → T-MOBILE USA, INC. 6529 SAN MATEO CA
— 650-281 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 SAN MATEO CA
— 650-284 4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 HALFMOONBY CA
— 650-315 0XXX2XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 SAN MATEO CA
— 650-333 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SSNFRNCSCO CA
— 650-346 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SAN MATEO CA
— 650-396 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 MT VIEW CA
— 650-444 none assigned yet which blocks → T-MOBILE USA, INC. 6529 PALO ALTO CA
— 650-451 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 PACIFICA CA
— 650-520 2XXX which blocks → T-MOBILE USA, INC. 6529 SAN MATEO CA
— 650-537 2XXX3XXX4XXX5XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 MT VIEW CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.