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 234
T-MOBILE USA, INC. 27
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
2023-01-04 234-359 0XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 AURORA OH
2021-07-20 234-304 0XXX1XXX2XXX3XXX4XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 HUDSON OH
2021-07-07 234-297 0XXX1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 NORTH LIMA OH
2020-09-30 234-286 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 WOOSTER OH
2020-09-11 234-283 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 WARREN OH
2018-10-31 234-259 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 TWINSBURG OH
2018-10-23 234-257 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 MONTROSE OH
2018-08-27 234-250 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 AKRON OH
2017-10-23 234-237 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 AKRON OH
2015-10-08 234-602 0–9 XXXall 10 · 8 holders which blocks → T-MOBILE USA, INC. 6529 HUDSON OH
2015-05-14 234-410 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CANTON OH
2014-10-13 234-334 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 AKRON OH
2014-09-11 234-716 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 AKRON OH
2013-09-20 234-817 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 AKRON OH
2013-07-10 234-303 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 AKRON OH
2013-06-14 234-804 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 CANTON OH
2012-06-08 234-214 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 CANTON OH
2012-03-12 234-205 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 AKRON OH
2011-08-05 234-223 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 WARREN OH
2009-03-23 234-521 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CANTON OH
2002-04-24 234-294 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → T-MOBILE USA, INC. 6529 GREENSBURG OH
2002-03-20 234-244 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 CORTLAND OH
2002-03-20 234-248 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 SHARON CTR OH
2002-03-20 234-369 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 MANCHESTR OH
2002-03-20 234-380 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 HUDSON OH
2002-03-20 234-650 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 MASSILLON OH
2002-03-20 234-759 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 NORTH LIMA OH

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.