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
2019-12-30 319-438-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F CENTRAL CY IA
2019-12-30 319-732-5XXX 5000–5999Assigned FRACTEL, LLC 965H KEOKUK IA
2019-12-27 319-582-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2019-12-17 319-300-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WATERLOO IA
2019-12-17 319-348-6XXX 6000–6999Assigned FRACTEL, LLC 965H WATERLOO IA
2019-12-17 319-348-8XXX 8000–8999Assigned FRACTEL, LLC 965H WATERLOO IA
2019-12-17 319-500-0XXX 0000–0999Assigned FRACTEL, LLC 965H VINTON IA
2019-12-17 319-500-5XXX 5000–5999Assigned FRACTEL, LLC 965H VINTON IA
2019-12-12 319-900-9XXX 9000–9999Assigned FRACTEL, LLC 965H CEDAR RPDS IA
2019-11-15 319-212-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 COLUMBSJCT IA
2019-10-31 319-205-0XXX 0000–0999Assigned TELNYX LLC 073H MT VERNON IA
2019-10-16 319-536-9XXX 9000–9999Assigned AIRUS, INC - IA 423H CEDAR RPDS IA
2019-09-06 319-251-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ANAMOSA IA
2019-09-05 319-408-2XXX 2000–2999Assigned AUREON COMMUNICATIONS, LLC 444G LISBON IA
2019-09-03 319-284-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 OELWEIN IA
2019-09-03 319-302-2XXX 2000–2999Assigned AIRUS, INC - IA 423H CENTER PT IA
2019-08-23 319-569-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 IOWA CITY IA
2019-08-22 319-205-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F MT VERNON IA
2019-08-22 319-212-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 COLUMBSJCT IA
2019-08-22 319-220-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F CENTRAL CY IA
2019-08-22 319-220-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F CENTRAL CY IA
2019-08-22 319-251-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F ANAMOSA IA
2019-08-22 319-264-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F OELWEIN IA
2019-08-22 319-271-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F INDEPNDNCE IA
2019-08-22 319-271-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F INDEPNDNCE IA
2019-08-22 319-300-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F WATERLOO IA
2019-08-22 319-302-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F CENTER PT IA
2019-08-22 319-318-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F VINTON IA
2019-08-22 319-406-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F DENVER IA
2019-08-22 319-419-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F WAVERLY IA
2019-08-22 319-526-9XXX 9000–9999Assigned ONVOY, LLC - IA 221F KEOKUK IA
2019-08-22 319-595-0XXX 0000–0999Assigned ONVOY, LLC - IA 221F WATERLOO IA
2019-08-22 319-595-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F WATERLOO IA
2019-08-22 319-600-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F IOWA CITY IA
2019-08-22 319-600-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F IOWA CITY IA
2019-08-22 319-600-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F IOWA CITY IA
2019-08-22 319-602-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F HUDSON IA
2019-08-22 319-666-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F CEDARFALLS IA
2019-08-22 319-666-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F CEDARFALLS IA
2019-08-22 319-669-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F FT MADISON IA
2019-08-22 319-671-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F BURLINGTON IA
2019-08-22 319-727-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F COGGON IA
2019-08-22 319-820-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F MONTICELLO IA
2019-08-22 319-900-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F CEDAR RPDS IA
2019-08-22 319-900-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F CEDAR RPDS IA
2019-08-22 319-900-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F CEDAR RPDS IA
2019-08-22 319-900-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F CEDAR RPDS IA
2019-08-22 319-900-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F CEDAR RPDS IA
2019-08-22 319-989-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F PARKERSBG IA
2019-08-07 319-318-5XXX 5000–5999Assigned IMON COMMUNICATIONS, LLC - IA 695G VINTON 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.