NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 360
T-MOBILE USA, INC. 66
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
2020-08-27 360-634 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 OLYMPIA WA
2020-03-26 360-206 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 CENTRALIA WA
2020-01-09 360-919 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
2019-10-01 360-995 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 OLYMPIA WA
2018-10-05 360-228 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
2017-02-21 360-644 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 LONGVIEW WA
2016-09-21 360-728 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
2016-01-22 360-763 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 OLYMPIA WA
2015-09-30 360-842 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
2015-09-25 360-726 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 VANCOUVER WA
2014-03-06 360-932 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
2014-01-27 360-890 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 OLYMPIA WA
2004-05-19 360-622 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SAN JUAN WA
2002-07-18 360-912 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 PT ANGELES WA
2002-07-18 360-914 2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 OAK HARBOR WA
2001-10-22 360-689 2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 SILVERDALE WA
2001-04-16 360-224 not yet reported which blocks → T-MOBILE USA, INC. 6529 WHATCOMCTY WA
2001-04-16 360-421 not yet reported which blocks → T-MOBILE USA, INC. 6529 MT VERNON WA
2001-04-16 360-440 not yet reported which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
2001-04-16 360-556 not yet reported which blocks → T-MOBILE USA, INC. 6529 OLYMPIA WA
2001-04-16 360-672 3XXX6XXX7XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 OAK HARBOR WA
2001-04-16 360-888 not yet reported which blocks → T-MOBILE USA, INC. 6529 OLYMPIA WA
2001-01-25 360-286 0XXX2XXX7XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 SILVERDALE WA
— 360-223 not yet reported which blocks → T-MOBILE USA, INC. 6529 WHATCOMCTY WA
— 360-239 none assigned yet which blocks → T-MOBILE USA, INC. 6529 OLYMPIA WA
— 360-241 2XXX which blocks → T-MOBILE USA, INC. 6529 VANCOUVER WA
— 360-250 none assigned yet which blocks → T-MOBILE USA, INC. 6529 OLYMPIA WA
— 360-261 6XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 LONGVIEW WA
— 360-281 none assigned yet which blocks → T-MOBILE USA, INC. 6529 VANCOUVER WA
— 360-304 1XXX2XXX3XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHEHALIS WA
— 360-310 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 ABERDEEN WA
— 360-324 0XXX2XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHEHALIS WA
— 360-326 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 VANCOUVER WA
— 360-340 8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 SILVERDALE WA
— 360-349 none assigned yet which blocks → T-MOBILE USA, INC. 6529 OLYMPIA WA
— 360-381 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 PTTOWNSEND WA
— 360-402 2XXX which blocks → T-MOBILE USA, INC. 6529 OLYMPIA WA
— 360-410 2XXX3XXX4XXX5XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 WHATCOMCTY WA
— 360-441 3XXX4XXX6XXX8XXX which blocks → T-MOBILE USA, INC. 6529 WHATCOMCTY WA
— 360-451 none assigned yet which blocks → T-MOBILE USA, INC. 6529 OLYMPIA WA
— 360-513 not yet reported which blocks → T-MOBILE USA, INC. 6529 VANCOUVER WA
— 360-518 9XXX which blocks → T-MOBILE USA, INC. 6529 VANCOUVER WA
— 360-521 2XXX which blocks → T-MOBILE USA, INC. 6529 VANCOUVER WA
— 360-525 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
— 360-540 not yet reported which blocks → T-MOBILE USA, INC. 6529 MT VERNON WA
— 360-551 4XXX which blocks → T-MOBILE USA, INC. 6529 SILVERDALE WA
— 360-610 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 MT VERNON WA
— 360-643 2XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → T-MOBILE USA, INC. 6529 PTTOWNSEND WA
— 360-649 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SILVERDALE WA
— 360-670 0XXX2XXX4XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 PT ANGELES WA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.