NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

12 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 319
ONVOY, LLC - IA 6
T-MOBILE USA, INC. 2
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 2
BANDWIDTH.COM CLEC, LLC - IA 2
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
2005-04-18 319-215-7XXX 7000–7999Assigned UNITED STATES CELLULAR - IA 6266 WATERLOO IA
2005-04-18 319-215-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IA 6266 WATERLOO IA
2005-04-18 319-215-9XXX 9000–9999Assigned UNITED STATES CELLULAR - IA 6266 WATERLOO IA
2005-04-18 319-238-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IA 6266 OELWEIN IA
2005-04-18 319-238-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IA 6266 OELWEIN IA
2005-03-10 319-355-0XXX 0000–0999Assigned QWEST CORPORATION 9631 CEDAR RPDS IA
2005-03-10 319-355-1XXX 1000–1999Assigned QWEST CORPORATION 9631 CEDAR RPDS IA
2005-03-10 319-355-2XXX 2000–2999Assigned QWEST CORPORATION 9631 CEDAR RPDS IA
2005-03-10 319-355-3XXX 3000–3999Assigned QWEST CORPORATION 9631 CEDAR RPDS IA
2005-03-10 319-355-4XXX 4000–4999Assigned QWEST CORPORATION 9631 CEDAR RPDS IA
2005-03-10 319-355-5XXX 5000–5999Assigned QWEST CORPORATION 9631 CEDAR RPDS IA
2005-03-10 319-355-6XXX 6000–6999Assigned QWEST CORPORATION 9631 CEDAR RPDS IA
2005-03-10 319-355-7XXX 7000–7999Assigned QWEST CORPORATION 9631 CEDAR RPDS IA
2005-03-10 319-355-8XXX 8000–8999Assigned QWEST CORPORATION 9631 CEDAR RPDS IA
2005-03-10 319-355-9XXX 9000–9999Assigned QWEST CORPORATION 9631 CEDAR RPDS IA
2005-03-09 319-213-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IA 6266 CEDAR RPDS IA
2005-03-09 319-213-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IA 6266 CEDAR RPDS IA
2005-03-09 319-213-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IA 6266 CEDAR RPDS IA
2005-03-09 319-213-3XXX 3000–3999Assigned UNITED STATES CELLULAR - IA 6266 CEDAR RPDS IA
2005-03-09 319-213-4XXX 4000–4999Assigned UNITED STATES CELLULAR - IA 6266 CEDAR RPDS IA
2005-03-09 319-213-5XXX 5000–5999Assigned UNITED STATES CELLULAR - IA 6266 CEDAR RPDS IA
2005-02-17 319-296-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WATERLOO IA
2005-02-11 319-594-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 IOWA CITY IA
2004-12-16 319-210-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CEDAR RPDS IA
2004-12-01 319-594-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 IOWA CITY IA
2004-11-24 319-215-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WATERLOO IA
2004-11-24 319-215-4XXX 4000–4999Assigned UNITED STATES CELLULAR - IA 6266 WATERLOO IA
2004-10-22 319-464-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IA 6266 WATERLOO IA
2004-10-22 319-464-4XXX 4000–4999Assigned UNITED STATES CELLULAR - IA 6266 WATERLOO IA
2004-10-22 319-464-5XXX 5000–5999Assigned UNITED STATES CELLULAR - IA 6266 WATERLOO IA
2004-10-22 319-464-6XXX 6000–6999Assigned UNITED STATES CELLULAR - IA 6266 WATERLOO IA
2004-10-22 319-464-7XXX 7000–7999Assigned UNITED STATES CELLULAR - IA 6266 WATERLOO IA
2004-10-11 319-210-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CEDAR RPDS IA
2004-09-02 319-433-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 WATERLOO IA
2004-09-02 319-433-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WATERLOO IA
2004-08-26 319-400-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 IOWA CITY IA
2004-07-15 319-213-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CEDAR RPDS IA
2004-06-29 319-316-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IA 6266 FT MADISON IA
2004-06-29 319-316-3XXX 3000–3999Assigned UNITED STATES CELLULAR - IA 6266 FT MADISON IA
2004-06-29 319-558-6XXX 6000–6999Assigned UNITED STATES CELLULAR - IA 6266 CEDAR RPDS IA
2004-06-29 319-558-7XXX 7000–7999Assigned UNITED STATES CELLULAR - IA 6266 CEDAR RPDS IA
2004-06-29 319-558-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IA 6266 CEDAR RPDS IA
2004-06-29 319-558-9XXX 9000–9999Assigned UNITED STATES CELLULAR - IA 6266 CEDAR RPDS IA
2004-01-05 319-614-1XXX 1000–1999Assigned LOCAL TELEPHONE DATA SERVICES CORP. 2842 PACKWOOD IA
2003-12-11 319-210-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CEDAR RPDS IA
2003-12-02 319-610-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WATERLOO IA
2003-11-26 319-669-9XXX 9000–9999Assigned METROPCS, INC. 5562 FT MADISON IA
2003-10-31 319-334-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 INDEPNDNCE IA
2003-07-18 319-283-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 OELWEIN IA
2003-07-18 319-283-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 OELWEIN IA

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.