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 916
T-MOBILE USA, INC. 40
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
2022-03-11 916-940 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SCRM NORTH CA
2021-05-17 916-908 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 FAIR OAKS CA
2021-05-17 916-957 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-05-04 916-818 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ELK GROVE CA
2021-02-25 916-707 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SCRM MAIN CA
2020-10-19 916-885 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 SCRM NORTH CA
2020-10-16 916-839 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 RSVL MAIN CA
2020-09-03 916-530 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SCRM MAIN CA
2020-08-25 916-510 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 FOLSOM CA
2020-08-13 916-829 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ELK GROVE CA
2016-10-24 916-713 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 SCRM NORTH CA
2016-09-26 916-345 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SCRM NORTH CA
2016-05-16 916-280 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ELK GROVE CA
2016-03-14 916-507 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SCRM NORTH CA
2015-09-25 916-755 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 RSVL MAIN CA
2015-08-04 916-513 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ELK GROVE CA
2015-07-02 916-750 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SCRM NORTH CA
2015-05-05 916-841 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SCRM MAIN CA
2015-04-16 916-793 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ELK GROVE CA
2015-03-17 916-693 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 FOLSOM CA
2015-03-11 916-695 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SCRM MAIN CA
2015-03-04 916-578 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SCRM MAIN CA
2015-02-24 916-664 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SCRM NORTH CA
2014-03-20 916-696 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 SCRM NORTH CA
2013-12-19 916-330 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 SCRM MAIN CA
2013-07-30 916-385 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ELK GROVE CA
2002-01-28 916-412 1XXX which blocks → T-MOBILE USA, INC. 6529 RSVL MAIN CA
2002-01-28 916-432 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 RIO LINDA CA
2002-01-28 916-477 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 WALNUT GRV CA
2001-12-28 916-220 not yet reported which blocks → T-MOBILE USA, INC. 6529 FOLSOM CA
2001-12-28 916-225 1XXX7XXX which blocks → T-MOBILE USA, INC. 6529 FAIR OAKS CA
2001-12-28 916-230 1XXX which blocks → T-MOBILE USA, INC. 6529 ELK GROVE CA
2001-10-18 916-595 not yet reported which blocks → T-MOBILE USA, INC. 6529 SCRM NORTH CA
2001-10-18 916-743 not yet reported which blocks → T-MOBILE USA, INC. 6529 SCRM MAIN CA
2001-04-24 916-475 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 SCRM MAIN CA
2001-03-01 916-796 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 RIO LINDA CA
— 916-270 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 WALNUT GRV CA
— 916-346 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SCRM MAIN CA
— 916-579 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 FAIR OAKS CA
— 916-620 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SCRM MAIN CA

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.