NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 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, all time — NPA 309
STRATUS NETWORKS 123
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
2021-03-22 309-870-1XXX 1000–1999Assigned STRATUS NETWORKS 495J CROPSEY IL
2021-03-22 309-878-1XXX 1000–1999Assigned STRATUS NETWORKS 495J COOKSVILLE IL
2021-03-03 309-473-1XXX 1000–1999Assigned STRATUS NETWORKS 495J HEYWORTH IL
2021-03-03 309-617-0XXX 0000–0999Assigned STRATUS NETWORKS 495J DUNLAP IL
2021-03-03 309-724-3XXX 3000–3999Assigned STRATUS NETWORKS 495J ELLSWORTH IL
2021-02-03 309-858-1XXX 1000–1999Assigned STRATUS NETWORKS 495J BIGGSVILLE IL
2021-02-03 309-859-1XXX 1000–1999Assigned STRATUS NETWORKS 495J GULFPORT IL
2021-01-30 309-237-1XXX 1000–1999Assigned STRATUS NETWORKS 495J BUSHNELL IL
2021-01-30 309-320-7XXX 7000–7999Assigned STRATUS NETWORKS 495J CAMERON IL
2021-01-30 309-388-9XXX 9000–9999Assigned STRATUS NETWORKS 495J KNOXVILLE IL
2021-01-30 309-598-8XXX 8000–8999Assigned STRATUS NETWORKS 495J KIRKWOOD IL
2021-01-30 309-599-0XXX 0000–0999Assigned STRATUS NETWORKS 495J LONDON ML IL
2021-01-30 309-703-0XXX 0000–0999Assigned STRATUS NETWORKS 495J ABINGDON IL
2021-01-30 309-775-9XXX 9000–9999Assigned STRATUS NETWORKS 495J PRAIRIE CY IL
2021-01-30 309-784-9XXX 9000–9999Assigned STRATUS NETWORKS 495J VERMONT IL
2021-01-30 309-801-0XXX 0000–0999Assigned STRATUS NETWORKS 495J STRONGHST IL
2021-01-30 309-955-9XXX 9000–9999Assigned STRATUS NETWORKS 495J WATAGA IL
2021-01-30 309-975-8XXX 8000–8999Assigned STRATUS NETWORKS 495J AVON IL
2020-11-23 309-841-1XXX 1000–1999Assigned STRATUS NETWORKS 495J ELIZA IL
2020-11-18 309-374-5XXX 5000–5999Assigned STRATUS NETWORKS 495J KEITHSBURG IL
2020-11-18 309-584-6XXX 6000–6999Assigned STRATUS NETWORKS 495J JOY IL
2020-11-18 309-587-4XXX 4000–4999Assigned STRATUS NETWORKS 495J NEW BOSTON IL
2020-11-18 309-771-8XXX 8000–8999Assigned STRATUS NETWORKS 495J HILLSDALE IL
2020-11-18 309-791-3XXX 3000–3999Assigned STRATUS NETWORKS 495J ILLINOISCY IL
2020-11-18 309-848-1XXX 1000–1999Assigned STRATUS NETWORKS 495J PORT BYRON IL
2020-11-13 309-790-2XXX 2000–2999Assigned STRATUS NETWORKS 495J TOPEKA IL
2020-09-18 309-804-1XXX 1000–1999Assigned STRATUS NETWORKS 495J SEATON IL
2020-09-18 309-805-1XXX 1000–1999Assigned STRATUS NETWORKS 495J RIO IL
2020-09-18 309-806-1XXX 1000–1999Assigned STRATUS NETWORKS 495J LITTLEYORK IL
2020-09-18 309-812-1XXX 1000–1999Assigned STRATUS NETWORKS 495J CARLOCK IL
2020-09-18 309-813-1XXX 1000–1999Assigned STRATUS NETWORKS 495J BELLFLOWER IL
2020-09-15 309-329-8XXX 8000–8999Assigned STRATUS NETWORKS 495J ASTORIA IL
2020-09-15 309-332-7XXX 7000–7999Assigned STRATUS NETWORKS 495J STANFORD IL
2020-09-15 309-378-9XXX 9000–9999Assigned STRATUS NETWORKS 495J DOWNS IL
2020-09-15 309-392-8XXX 8000–8999Assigned STRATUS NETWORKS 495J MINIERAGTN IL
2020-09-15 309-475-7XXX 7000–7999Assigned STRATUS NETWORKS 495J SAYBROOK IL
2020-09-15 309-488-8XXX 8000–8999Assigned STRATUS NETWORKS 495J FARMERCITY IL
2020-09-15 309-490-0XXX 0000–0999Assigned STRATUS NETWORKS 495J LEXINGTON IL
2020-09-15 309-499-9XXX 9000–9999Assigned STRATUS NETWORKS 495J LE ROY IL
2020-09-15 309-503-6XXX 6000–6999Assigned STRATUS NETWORKS 495J TOWANDA IL
2020-09-15 309-513-0XXX 0000–0999Assigned STRATUS NETWORKS 495J ALEDO IL
2020-09-15 309-514-1XXX 1000–1999Assigned STRATUS NETWORKS 495J ALBANY IL
2020-09-15 309-515-0XXX 0000–0999Assigned STRATUS NETWORKS 495J ERIE IL
2020-09-15 309-529-1XXX 1000–1999Assigned STRATUS NETWORKS 495J ALPHA IL
2020-09-15 309-542-1XXX 1000–1999Assigned STRATUS NETWORKS 495J MCLEAN IL
2020-09-15 309-551-1XXX 1000–1999Assigned STRATUS NETWORKS 495J MATHERVL IL
2020-09-15 309-559-0XXX 0000–0999Assigned STRATUS NETWORKS 495J OQUAWKA IL
2020-09-15 309-560-1XXX 1000–1999Assigned STRATUS NETWORKS 495J COLFAX IL
2020-09-15 309-568-8XXX 8000–8999Assigned STRATUS NETWORKS 495J ANDOVER IL
2020-09-15 309-581-8XXX 8000–8999Assigned STRATUS NETWORKS 495J MOLINE IL

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.