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 970
QWEST CORPORATION 189
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
— 970-283 2XXX3XXX4XXX7XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9636 DE BEQUE CO
— 970-284 2XXX3XXX4XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9636 LA SALLE CO
— 970-285 3XXX4XXX8XXX · 2 holders which blocks → QWEST CORPORATION 9636 PARACHUTE CO
— 970-288 not yet reported which blocks → QWEST CORPORATION 9636 FT COLLINS CO
— 970-304 not yet reported which blocks → QWEST CORPORATION 9636 GREELEY CO
— 970-323 2XXX3XXX4XXX7XXX · 3 holders which blocks → QWEST CORPORATION 9636 OLATHE CO
— 970-325 2XXX3XXX5XXX6XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9636 OURAY CO
— 970-330 not yet reported which blocks → QWEST CORPORATION 9636 GREELEY CO
— 970-335 8XXX9XXX which blocks → QWEST CORPORATION 9636 DURANGO CO
— 970-336 not yet reported which blocks → QWEST CORPORATION 9636 GREELEY CO
— 970-339 not yet reported which blocks → QWEST CORPORATION 9636 GREELEY CO
— 970-346 not yet reported which blocks → QWEST CORPORATION 9636 GREELEY CO
— 970-347 0XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9636 GREELEY CO
— 970-348 not yet reported which blocks → QWEST CORPORATION 9636 GREELEY CO
— 970-349 not yet reported which blocks → QWEST CORPORATION 9636 CRESTEDBTE CO
— 970-350 not yet reported which blocks → QWEST CORPORATION 9636 GREELEY CO
— 970-351 not yet reported which blocks → QWEST CORPORATION 9636 GREELEY CO
— 970-352 not yet reported which blocks → QWEST CORPORATION 9636 GREELEY CO
— 970-353 not yet reported which blocks → QWEST CORPORATION 9636 GREELEY CO
— 970-356 not yet reported which blocks → QWEST CORPORATION 9636 GREELEY CO
— 970-369 2XXX3XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9636 TELLURIDE CO
— 970-375 not yet reported which blocks → QWEST CORPORATION 9636 DURANGO CO
— 970-377 not yet reported which blocks → QWEST CORPORATION 9636 FT COLLINS CO
— 970-378 not yet reported which blocks → QWEST CORPORATION 9636 GREELEY CO
— 970-382 1XXX which blocks → QWEST CORPORATION 9636 DURANGO CO
— 970-384 not yet reported which blocks → QWEST CORPORATION 9636 GLENWD SPG CO
— 970-385 not yet reported which blocks → QWEST CORPORATION 9636 DURANGO CO
— 970-387 2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → QWEST CORPORATION 9636 SILVERTON CO
— 970-392 not yet reported which blocks → QWEST CORPORATION 9636 GREELEY CO
— 970-395 not yet reported which blocks → QWEST CORPORATION 9636 GREELEY CO
— 970-407 none assigned yet which blocks → QWEST CORPORATION 9636 FT COLLINS CO
— 970-416 not yet reported which blocks → QWEST CORPORATION 9636 FT COLLINS CO
— 970-419 9XXX which blocks → QWEST CORPORATION 9636 FT COLLINS CO
— 970-429 4XXX5XXX8XXX · 2 holders which blocks → QWEST CORPORATION 9636 ASPEN CO
— 970-434 not yet reported which blocks → QWEST CORPORATION 9636 GRAND JCT CO
— 970-435 none assigned yet which blocks → QWEST CORPORATION 9636 SO LARAMIE CO
— 970-453 not yet reported which blocks → QWEST CORPORATION 9636 BRECKENRDG CO
— 970-454 6XXX7XXX which blocks → QWEST CORPORATION 9636 EATON CO
— 970-461 not yet reported which blocks → QWEST CORPORATION 9636 LOVELAND CO
— 970-463 2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9636 JULESBURG CO
— 970-464 2XXX3XXX8XXX · 2 holders which blocks → QWEST CORPORATION 9636 PALISADE CO
— 970-468 not yet reported which blocks → QWEST CORPORATION 9636 DILLON CO
— 970-472 not yet reported which blocks → QWEST CORPORATION 9636 FT COLLINS CO
— 970-474 5XXX6XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9636 JULESBURG CO
— 970-476 not yet reported which blocks → QWEST CORPORATION 9636 VAIL CO
— 970-477 none assigned yet which blocks → QWEST CORPORATION 9636 VAIL CO
— 970-479 not yet reported which blocks → QWEST CORPORATION 9636 VAIL CO
— 970-482 not yet reported which blocks → QWEST CORPORATION 9636 FT COLLINS CO
— 970-484 not yet reported which blocks → QWEST CORPORATION 9636 FT COLLINS CO
— 970-490 not yet reported which blocks → QWEST CORPORATION 9636 FT COLLINS CO

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.