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 574
NEW CINGULAR WIRELESS PCS, LLC - IL 49
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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2025-09-22 574-414 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND IN
2024-07-11 574-407 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GOSHEN IN
2023-10-16 574-399 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ELKHART IN
2021-01-06 574-368 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ELKHART IN
2020-11-04 574-359 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ELKHART IN
2011-11-16 574-201 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROCHESTER IN
2011-06-14 574-290 1XXX2XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KEWANNA IN
2009-12-21 574-200 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WINAMAC IN
2009-12-01 574-341 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PLYMOUTH IN
2008-11-05 574-747 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ELKHART IN
2008-10-21 574-440 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND IN
2008-03-07 574-387 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND IN
2006-02-06 574-855 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND IN
2003-06-04 574-302 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND IN
2002-08-27 574-575 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ELKHART IN
2002-02-15 574-339 5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND IN
— 574-202 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GOSHEN IN
— 574-208 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND IN
— 574-209 4XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BREMEN IN
— 574-210 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND IN
— 574-214 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ELKHART IN
— 574-215 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ELKHART IN
— 574-216 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CULVER IN
— 574-220 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND IN
— 574-225 3XXX4XXX5XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WINAMAC IN
— 574-227 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MILLWOOD IN
— 574-250 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND IN
— 574-292 7XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND IN
— 574-298 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND IN
— 574-305 2XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MILLWOOD IN
— 574-328 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BURKET IN
— 574-332 2XXX3XXX7XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARGOS IN
— 574-340 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND IN
— 574-505 1XXX4XXX5XXX6XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MACY IN
— 574-518 3XXX8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SYRACUSE IN
— 574-521 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SYRACUSE IN
— 574-549 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WARSAW IN
— 574-551 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WARSAW IN
— 574-581 2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MONTICELLO IN
— 574-603 3XXX4XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BURNETTSVL IN
— 574-702 1XXX2XXX3XXX5XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LOGANSPORT IN
— 574-721 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LOGANSPORT IN
— 574-727 2XXX7XXX8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LOGANSPORT IN
— 574-806 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KNOX IN
— 574-817 1XXX7XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KEWANNA IN
— 574-835 5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROCHESTER IN
— 574-910 1XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WALKERTON IN
— 574-952 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARGOS IN
— 574-993 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND IN

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.