NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

12 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2022-03-15 319-995-5XXX 5000–5999Assigned TON80 COMMUNICATIONS, LLC 516J WINFIELD IA
2022-03-14 319-566-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J RICHLAND IA
2022-03-14 319-633-4XXX 4000–4999Assigned TON80 COMMUNICATIONS, LLC 516J LONE TREE IA
2022-03-14 319-922-2XXX 2000–2999Assigned TON80 COMMUNICATIONS, LLC 516J SALEM IA
2022-03-10 319-204-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MTPLEASANT IA
2022-03-10 319-733-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J FARMINGTON IA
2022-03-10 319-893-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2022-03-10 319-893-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2022-03-10 319-893-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2022-03-10 319-893-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2022-03-10 319-997-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J NEW LONDON IA
2022-03-08 319-636-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J HAZLETON IA
2022-03-04 319-336-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J HILLS IA
2022-03-04 319-543-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J SOLON IA
2022-03-04 319-942-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J HILLSBORO IA
2022-03-04 319-996-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J HOUGHTON IA
2022-03-02 319-225-5XXX 5000–5999Assigned TON80 COMMUNICATIONS, LLC 516J AMANA IA
2022-03-02 319-322-2XXX 2000–2999Assigned TON80 COMMUNICATIONS, LLC 516J NORWAY IA
2022-03-02 319-867-4XXX 4000–4999Assigned TON80 COMMUNICATIONS, LLC 516J IOWA CITY IA
2022-02-28 319-966-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J GRANDVIEW IA
2022-02-24 319-588-8XXX 8000–8999Assigned TON80 COMMUNICATIONS, LLC 516J ARGYLE IA
2022-02-24 319-742-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J DENMARK IA
2022-02-22 319-405-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E ANAMOSA IA
2022-02-18 319-244-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J ELY IA
2022-02-18 319-675-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J OXFORD IA
2022-02-17 319-222-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J CEDARFALLS IA
2022-02-17 319-262-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J KALONA IA
2022-02-17 319-282-4XXX 4000–4999Assigned TON80 COMMUNICATIONS, LLC 516J NO ENGLISH IA
2022-02-17 319-426-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J FAIRBANK IA
2022-02-17 319-663-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J BLAIRSTOWN IA
2022-02-17 319-746-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J BRANDON IA
2022-02-08 319-326-9XXX 9000–9999Assigned UNITED STATES CELLULAR - IA 6266 INDEPNDNCE IA
2022-02-01 319-441-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F CENTER PT IA
2022-01-27 319-405-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E ANAMOSA IA
2022-01-25 319-222-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 CEDARFALLS IA
2022-01-25 319-344-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 COLUMBSJCT IA
2022-01-25 319-460-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 WASHINGTON IA
2022-01-25 319-500-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 VINTON IA
2022-01-25 319-881-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 WAPELLO IA
2022-01-16 319-324-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F BRIGHTON IA
2022-01-16 319-407-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F WAVERLY IA
2022-01-16 319-410-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F OELWEIN IA
2022-01-14 319-441-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CENTER PT IA
2021-12-29 319-317-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 CEDAR RPDS IA
2021-12-29 319-344-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F COLUMBSJCT IA
2021-12-29 319-410-1XXX 1000–1999Assigned AUREON COMMUNICATIONS, LLC 444G OELWEIN IA
2021-12-15 319-324-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F BRIGHTON IA
2021-12-15 319-326-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F INDEPNDNCE IA
2021-12-14 319-407-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IA 6266 WAVERLY IA
2021-12-08 319-539-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F RIVERSIDE IA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.