NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

372 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/30/2026

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, last 30 days
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 574-834 8XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 NO WEBSTER IN
— 574-835 5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROCHESTER IN
— 574-842 0XXX1XXX6XXX9XXX · 3 holders which blocks → INDIANA BELL TEL CO INC 9325 CULVER IN
— 574-847 0XXX1XXX4XXX7XXX8XXX · 5 holders which blocks → METROPCS, INC. 5562 ROCHESTER IN
— 574-848 3XXX6XXX8XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 BRISTOL IN
— 574-849 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 ELKHART IN
— 574-850 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 SOUTH BEND IN
— 574-857 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 FULTON IN
— 574-858 6XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 ATWOOD IN
— 574-859 5XXX6XXX8XXX · 2 holders which blocks → CAMDEN TEL. CO., INC. 0744 DEER CREEK IN
— 574-862 0XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 WAKARUSA IN
— 574-867 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 HAMLET IN
— 574-875 2XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 DUNLAP IN
— 574-876 none assigned yet which blocks → METROPCS, INC. 5562 SOUTH BEND IN
— 574-889 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 LUCERNE IN
— 574-891 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 DUNLAP IN
— 574-892 1XXX4XXX which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 ARGOS IN
— 574-893 0XXX2XXX3XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 AKRON IN
— 574-896 1XXX7XXX8XXX9XXX · 4 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 NO JUDSON IN
— 574-910 1XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WALKERTON IN
— 574-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IN
— 574-913 not yet reported which blocks → INDIANA PAGING NETWORK, INC. 6795 PLYMOUTH IN
— 574-930 9XXX which blocks → METROPCS, INC. 5562 PLYMOUTH IN
— 574-931 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 SOUTH BEND IN
— 574-935 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 PLYMOUTH IN
— 574-936 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 PLYMOUTH IN
— 574-941 none assigned yet which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 PLYMOUTH IN
— 574-943 0XXX2XXX5XXX6XXX9XXX · 4 holders which blocks → FRONTIER MIDSTATES, INC. - IN 0831 IDAVILLE IN
— 574-946 1XXX8XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 WINAMAC IN
— 574-948 1XXX which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 PLYMOUTH IN
— 574-950 not yet reported which blocks → IN
— 574-952 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARGOS IN
— 574-958 not yet reported which blocks → IN
— 574-959 not yet reported which blocks → IN
— 574-965 not yet reported which blocks → YEOMAN TEL. CO., INC. 0839 YEOMAN IN
— 574-966 5XXX6XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J BRISTOL IN
— 574-967 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 FLORA IN
— 574-968 not yet reported which blocks → PAETEC ITEL, LLC 829J SOUTH BEND IN
— 574-970 not yet reported which blocks → PAETEC ITEL, LLC 829J ELKHART IN
— 574-976 not yet reported which blocks → IN
— 574-993 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND IN
— 575-202 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 LAS CRUCES NM
— 575-208 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NM 5470 ROSWELL NM
— 575-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT NM
— 575-222 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J LAS CRUCES NM
— 575-225 not yet reported which blocks → LEACO RURAL TEL. COOP., INC. 2264 ANTLPE RDG NM
— 575-226 not yet reported which blocks → YUCCA TELECOMM SYSTEMS, INC., DBA YUCCA COMM-NM 2350 PORTALES NM
— 575-231 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 ARTESIA NM
— 575-233 6XXX7XXX8XXX · 2 holders which blocks → QWEST CORPORATION 9636 LA MESA NM
— 575-234 not yet reported which blocks → VALOR TELECOM TX,LP-NM #1 DBA WINDSTREAM COMM SW 1164 CARLSBAD NM

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.