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 402
QWEST CORPORATION 160
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
2011-07-08 402-507 0–9 XXXall 10 · 5 holders which blocks → QWEST CORPORATION 9631 OMAHA NE
2009-01-09 402-836 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9631 OMAHA NE
2002-10-28 402-544 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
2001-04-26 402-371 not yet reported which blocks → QWEST CORPORATION 9631 NORFOLK NE
2001-04-26 402-379 not yet reported which blocks → QWEST CORPORATION 9631 NORFOLK NE
2001-04-26 402-396 0XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → QWEST CORPORATION 9631 PILGER NE
2001-04-26 402-622 not yet reported which blocks → QWEST CORPORATION 9631 NORFOLK NE
2001-04-26 402-644 1XXX which blocks → QWEST CORPORATION 9631 NORFOLK NE
2001-04-26 402-844 0XXX1XXX6XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9631 NORFOLK NE
— 402-220 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-221 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-222 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-231 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-233 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-238 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-241 5XXX7XXX8XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9631 SOSIOUX CY NE
— 402-253 0XXX1XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-255 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-256 0XXX1XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9631 LAUREL NE
— 402-271 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-272 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-280 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-285 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → QWEST CORPORATION 9631 CRESTON NE
— 402-287 4XXX6XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9631 WAKEFIELD NE
— 402-289 7XXX8XXX · 2 holders which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-291 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-292 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-293 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-330 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-331 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-332 1XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-333 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-334 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-336 0XXX6XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9631 O NEILL NE
— 402-337 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → QWEST CORPORATION 9631 RANDOLPH NE
— 402-339 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-341 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-342 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-343 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-344 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-345 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-346 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-348 9XXX which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-351 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-352 6XXX which blocks → QWEST CORPORATION 9631 SCHUYLER NE
— 402-359 0XXX1XXX3XXX7XXX · 2 holders which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-361 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-370 0XXX2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9631 NORFOLK NE
— 402-372 none assigned yet which blocks → QWEST CORPORATION 9631 WEST POINT NE
— 402-374 4XXX6XXX7XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9631 TEKAMAH NE

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.