NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

1 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 414
BANDWIDTH.COM CLEC, LLC - WI 1
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 thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2005-10-11 414-721-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF WISCONSIN, LP - WI 7322 MILWAUKZN1 WI
2005-10-11 414-721-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF WISCONSIN, LP - WI 7322 MILWAUKZN1 WI
2005-10-11 414-721-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF WISCONSIN, LP - WI 7322 MILWAUKZN1 WI
2005-09-30 414-326-3XXX 3000–3999Assigned TDS METROCOM, LLC 520K MILWAUKZN1 WI
2005-09-30 414-758-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MILWAUKZN1 WI
2005-09-30 414-810-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K MILWAUKZN1 WI
2005-09-30 414-810-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K MILWAUKZN1 WI
2005-09-20 414-326-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2005-08-22 414-377-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN3 WI
2005-08-12 414-755-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J MILWAUKZN1 WI
2005-08-09 414-721-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MILWAUKZN1 WI
2005-08-09 414-721-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MILWAUKZN1 WI
2005-06-29 414-238-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MILWAUKZN1 WI
2005-06-29 414-238-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MILWAUKZN1 WI
2005-06-29 414-238-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MILWAUKZN1 WI
2005-06-29 414-238-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MILWAUKZN1 WI
2005-06-29 414-238-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MILWAUKZN1 WI
2005-06-24 414-248-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2005-06-24 414-248-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2005-06-21 414-375-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN4 WI
2005-06-21 414-375-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN4 WI
2005-06-21 414-763-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K MILWAUKZN1 WI
2005-06-21 414-763-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K MILWAUKZN1 WI
2005-06-21 414-810-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K MILWAUKZN1 WI
2005-06-21 414-810-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K MILWAUKZN1 WI
2005-06-09 414-755-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J MILWAUKZN1 WI
2005-06-09 414-755-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J MILWAUKZN1 WI
2005-06-01 414-446-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K MILWAUKZN4 WI
2005-05-23 414-243-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2005-05-23 414-248-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2005-05-10 414-376-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN5 WI
2005-05-10 414-376-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN5 WI
2005-04-26 414-755-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J MILWAUKZN1 WI
2005-03-03 414-231-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF WISCONSIN, LP - WI 7322 MILWAUKZN1 WI
2005-02-28 414-243-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2005-02-11 414-238-2XXX 2000–2999Assigned TDS METROCOM, LLC 520K MILWAUKZN1 WI
2004-12-28 414-455-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2004-12-28 414-455-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2004-11-11 414-409-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN3 WI
2004-11-11 414-446-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN4 WI
2004-11-11 414-455-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2004-11-11 414-501-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN5 WI
2004-10-28 414-243-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2004-10-28 414-243-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2004-10-27 414-375-1XXX 1000–1999Assigned TDS METROCOM, LLC 520K MILWAUKZN4 WI
2004-10-15 414-763-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K MILWAUKZN1 WI
2004-10-15 414-763-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K MILWAUKZN1 WI
2004-10-15 414-763-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K MILWAUKZN1 WI
2004-10-15 414-763-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K MILWAUKZN1 WI
2004-10-15 414-763-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K MILWAUKZN1 WI

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.