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 928
NEW CINGULAR WIRELESS PCS, LLC 43
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
2026-01-14 928-557 0XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SAFFORD AZ
2022-10-21 928-495 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PRESCOTT AZ
2022-05-10 928-375 0XXX1XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALOME AZ
2022-02-09 928-481 2XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BLUE RIDGE AZ
2022-02-09 928-609 2XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 GREENEHVN AZ
2022-02-09 928-631 2XXX3XXX4XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MORMONLAKE AZ
2021-09-23 928-431 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BLACK MESA AZ
2021-09-23 928-452 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BONITA AZ
2021-09-23 928-545 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TEECNOSPOS AZ
2021-07-19 928-410 0XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 GANADO AZ
2021-05-18 928-406 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 WINSLOW AZ
2021-05-04 928-405 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FLAGSTAFF AZ
2015-03-13 928-605 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BULLHEADCY AZ
2014-08-28 928-383 0XXX1XXX7XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CHINLE AZ
2011-10-21 928-319 2XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DILKON AZ
2010-10-15 928-275 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 GLOBE AZ
2010-10-15 928-363 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PAYSON AZ
2010-05-26 928-280 7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TUBA CITY AZ
2010-05-26 928-730 3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FTDEFIANCE AZ
2006-06-12 928-287 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 YUMA AZ
2006-03-08 928-271 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 YUMA AZ
2006-02-16 928-292 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CLIFTON AZ
2004-08-19 928-377 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KINGMAN AZ
2004-03-29 928-249 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LKMHVRNCHS AZ
2004-03-25 928-218 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MEADVIEW AZ
2001-12-18 928-502 3XXX4XXX5XXX6XXX7XXX8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 YUMA AZ
2001-11-19 928-234 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BULLHEADCY AZ
2001-11-19 928-846 3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LKHAVASUCY AZ
2001-11-19 928-897 3XXX4XXX5XXX7XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KINGMAN AZ
2001-09-04 928-814 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FLAGSTAFF AZ
2001-03-19 928-412 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LKHAVASUCY AZ
— 928-201 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BULLHEADCY AZ
— 928-221 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FLAGSTAFF AZ
— 928-273 4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PRESCOTT AZ
— 928-274 4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SEDONA AZ
— 928-380 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FLAGSTAFF AZ
— 928-517 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PAYSON AZ
— 928-530 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KINGMAN AZ
— 928-595 4XXX5XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PAYSON AZ
— 928-612 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PAGE AZ
— 928-701 4XXX5XXX6XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 GLOBE AZ
— 928-706 1XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LKHAVASUCY AZ
— 928-719 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 GLOBE AZ

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.