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
2012-02-22 319-531-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CEDAR RPDS IA
2012-02-21 319-486-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 WATERLOO IA
2012-02-21 319-499-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 IOWA CITY IA
2012-02-14 319-332-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 INDEPNDNCE IA
2012-02-08 319-529-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 WATERLOO IA
2012-02-07 319-820-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E MONTICELLO IA
2012-01-25 319-486-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WATERLOO IA
2012-01-10 319-332-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E INDEPNDNCE IA
2011-12-28 319-284-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E OELWEIN IA
2011-12-16 319-938-3XXX 3000–3999Assigned INDEPENDENCE TELECOMMUNICATIONS UTILITY - IA 649D ROWLEY IA
2011-11-28 319-409-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J CEDAR RPDS IA
2011-11-28 319-826-3XXX 3000–3999Assigned MCC TELEPHONY LLC 593K CEDAR RPDS IA
2011-11-16 319-313-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 KEOKUK IA
2011-11-15 319-481-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F ANAMOSA IA
2011-11-15 319-576-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F BURLINGTON IA
2011-11-15 319-984-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F DENVER IA
2011-11-11 319-536-0XXX 0000–0999Assigned SHELLSBURG CABLEVISION, INC. - IA 527G CEDAR RPDS IA
2011-11-09 319-343-0XXX 0000–0999Assigned SHELLSBURG CABLEVISION, INC. - IA 527G CENTER PT IA
2011-10-31 319-693-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CEDAR RPDS IA
2011-10-24 319-209-2XXX 2000–2999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F BURLINGTON IA
2011-10-21 319-486-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 WATERLOO IA
2011-10-21 319-531-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2011-10-21 319-531-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2011-10-18 319-531-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CEDAR RPDS IA
2011-10-03 319-327-6XXX 6000–6999Assigned UNITED STATES CELLULAR - IA 6266 INDEPNDNCE IA
2011-10-03 319-404-6XXX 6000–6999Assigned UNITED STATES CELLULAR - IA 6266 WATERLOO IA
2011-10-03 319-795-9XXX 9000–9999Assigned UNITED STATES CELLULAR - IA 6266 KEOKUK IA
2011-09-28 319-531-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CEDAR RPDS IA
2011-09-22 319-988-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E HUDSON IA
2011-09-15 319-531-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2011-09-12 319-540-7XXX 7000–7999Assigned UNITED STATES CELLULAR - IA 6266 CEDAR RPDS IA
2011-09-12 319-768-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IA 6266 BURLINGTON IA
2011-08-11 319-284-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 OELWEIN IA
2011-08-11 319-383-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 IOWA CITY IA
2011-08-09 319-486-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 WATERLOO IA
2011-08-04 319-774-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 CEDAR RPDS IA
2011-07-25 319-383-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 IOWA CITY IA
2011-07-19 319-214-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E VINTON IA
2011-07-19 319-535-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E MT VERNON IA
2011-07-19 319-826-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2011-07-19 319-826-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2011-07-18 319-481-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E ANAMOSA IA
2011-06-27 319-481-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E ANAMOSA IA
2011-06-27 319-849-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CENTER PT IA
2011-06-07 319-671-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BURLINGTON IA
2011-06-07 319-883-3XXX 3000–3999Assigned MCC TELEPHONY LLC 593K WATERLOO IA
2011-06-03 319-383-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 IOWA CITY IA
2011-06-03 319-883-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WATERLOO IA
2011-05-24 319-208-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E BURLINGTON IA
2011-05-24 319-242-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CEDARFALLS 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.