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
2019-08-06 319-666-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CEDARFALLS IA
2019-07-15 319-212-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 COLUMBSJCT IA
2019-06-28 319-844-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 MONTICELLO IA
2019-06-24 319-867-5XXX 5000–5999Assigned COMMIO, LLC 939H IOWA CITY IA
2019-06-20 319-528-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DENMARK IA
2019-06-17 319-346-0XXX 0000–0999Assigned AUREON COMMUNICATIONS, LLC 444G PARKERSBG IA
2019-06-14 319-300-4XXX 4000–4999Assigned MCC TELEPHONY LLC 593K WATERLOO IA
2019-06-10 319-569-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 IOWA CITY IA
2019-06-05 319-300-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WATERLOO IA
2019-05-23 319-264-3XXX 3000–3999Assigned TELNYX LLC 073H OELWEIN IA
2019-05-23 319-271-4XXX 4000–4999Assigned TELNYX LLC 073H INDEPNDNCE IA
2019-05-23 319-300-2XXX 2000–2999Assigned TELNYX LLC 073H WATERLOO IA
2019-05-23 319-302-0XXX 0000–0999Assigned TELNYX LLC 073H CENTER PT IA
2019-05-23 319-536-8XXX 8000–8999Assigned TELNYX LLC 073H CEDAR RPDS IA
2019-05-23 319-666-1XXX 1000–1999Assigned TELNYX LLC 073H CEDARFALLS IA
2019-05-15 319-645-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 TIFFIN IA
2019-05-08 319-302-1XXX 1000–1999Assigned AIRUS, INC - IA 423H CENTER PT IA
2019-04-30 319-206-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2019-04-30 319-206-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2019-04-29 319-318-9XXX 9000–9999Assigned AIRUS, INC - IA 423H VINTON IA
2019-04-29 319-666-0XXX 0000–0999Assigned AIRUS, INC - IA 423H CEDARFALLS IA
2019-04-26 319-224-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E TROY MILLS IA
2019-04-15 319-238-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F OELWEIN IA
2019-04-15 319-250-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F FT MADISON IA
2019-04-08 319-600-0XXX 0000–0999Assigned FRACTEL, LLC 965H IOWA CITY IA
2019-04-08 319-727-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 COGGON IA
2019-04-04 319-252-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WATERLOO IA
2019-04-04 319-888-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 WATERLOO IA
2019-04-03 319-259-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E IOWA CITY IA
2019-03-19 319-204-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 MTPLEASANT IA
2019-03-04 319-569-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E IOWA CITY IA
2019-02-25 319-900-0XXX 0000–0999Assigned TERRA NOVA TELECOM INC. 145J CEDAR RPDS IA
2019-02-19 319-289-9XXX 9000–9999Assigned AIRUS, INC - IA 423H CEDAR RPDS IA
2019-02-11 319-989-5XXX 5000–5999Assigned UNITED STATES CELLULAR - IA 6266 PARKERSBG IA
2019-01-28 319-666-6XXX 6000–6999Assigned FRACTEL, LLC 965H CEDARFALLS IA
2018-12-18 319-300-1XXX 1000–1999Assigned AIRUS, INC - IA 423H WATERLOO IA
2018-12-05 319-289-8XXX 8000–8999Assigned MCC TELEPHONY LLC 593K CEDAR RPDS IA
2018-11-07 319-774-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2018-11-07 319-777-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2018-11-06 319-775-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 CEDAR RPDS IA
2018-10-19 319-569-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 IOWA CITY IA
2018-10-18 319-552-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MTPLEASANT IA
2018-10-11 319-458-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WASHINGTON IA
2018-10-08 319-800-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 IOWA CITY IA
2018-10-02 319-595-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 WATERLOO IA
2018-09-28 319-206-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 CEDAR RPDS IA
2018-09-12 319-670-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 KEOKUK IA
2018-09-11 319-743-2XXX 2000–2999Assigned AIRUS, INC - IA 423H CEDAR RPDS IA
2018-09-07 319-582-0XXX 0000–0999Assigned AIRESPRING, INC. 996H CEDAR RPDS IA
2018-08-30 319-569-8XXX 8000–8999Assigned AIRUS, INC - IA 423H IOWA CITY 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.