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 715
NEW CINGULAR WIRELESS PCS, LLC - IL 100
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 99
FRONTIER NORTH INC. - WI 55
WISCONSIN BELL INC 41
CHARTER IP ENABLED SERVICES, LLC 36
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
2002-08-26 715-881 8XXX which blocks → NEW CELL DBA CELLCOM 6692 WITTENBERG WI
2002-08-22 715-889 5XXX6XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 LAONA WI
2002-08-20 715-220 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 HUDSON WI
2002-08-20 715-316 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 COLBY WI
2002-08-20 715-406 0XXX2XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 SPENCER WI
2002-08-20 715-407 0XXX3XXX5XXX6XXX7XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 STRATFORD WI
2002-08-20 715-408 0XXX2XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 OWEN WI
2002-08-20 715-502 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MARSHFIELD WI
2002-08-20 715-503 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 LOYAL WI
2002-08-05 715-965 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MEDFORD WI
2002-08-05 715-966 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 TOMAHAWK WI
2002-07-25 715-891 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 EAGLERIVER WI
2002-07-25 715-892 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MINOCQUA WI
2002-07-17 715-861 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 CHIPPEWFLS WI
2002-07-08 715-781 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 HUDSON WI
2002-06-13 715-803 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 WAUSAU WI
2002-06-13 715-804 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MERRILL WI
2002-05-30 715-441 0XXX5XXX7XXX · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 HUDSON WI
2002-05-30 715-816 0XXX2XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GORDON WI
2002-05-30 715-817 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SUPERIOR WI
2002-05-29 715-512 1XXX2XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 THORP WI
2002-05-13 715-952 0XXX1XXX2XXX5XXX7XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 STEVENS PT WI
2002-05-13 715-953 0XXX1XXX2XXX3XXX5XXX6XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MENOMONIE WI
2002-05-13 715-954 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 HOULTON WI
2002-05-13 715-955 none assigned yet which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 EAU CLAIRE WI
2002-04-08 715-222 6XXX7XXX8XXX which blocks → AERIAL COMMUNICATIONS, INC. 6701 HUDSON WI
2002-03-18 715-401 5XXX6XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 RHINELANDR WI
2002-03-12 715-697 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 WISCOSNRPD WI
2002-03-01 715-598 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 EAU CLAIRE WI
2002-02-26 715-432 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WAUSAU WI
2002-02-04 715-578 0XXX1XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 MENOMONIE WI
2002-01-11 715-651 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 RICE LAKE WI
2002-01-11 715-657 1XXX2XXX3XXX5XXX6XXX7XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 OGEMA WI
2002-01-11 715-661 4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 PARK FALLS WI
2002-01-11 715-663 1XXX2XXX3XXX6XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 GLIDDEN WI
2002-01-11 715-681 2XXX6XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MELLEN WI
2001-12-28 715-562 5XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 HURLEY WI
2001-12-28 715-566 5XXX6XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 FREDERIC WI
2001-12-28 715-567 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 HAWKINS WI
2001-12-26 715-531 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → WISCONSIN BELL INC 9327 HUDSON WI
2001-12-05 715-226 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 JIM FALLS WI
2001-12-05 715-312 1XXX2XXX4XXX7XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 HOLCOMBE WI
2001-12-05 715-313 1XXX2XXX7XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 BOYD WI
2001-12-05 715-314 2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 JUMP RIVER WI
2001-12-05 715-416 4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 SPOONER WI
2001-12-05 715-417 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 OSCEOLA WI
2001-12-05 715-418 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 BARRON WI
2001-12-05 715-419 4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 CUMBERLAND WI
2001-12-05 715-553 3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 CENTURIA WI
2001-12-05 715-554 5XXX6XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 BALSAMLAKE WI

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.