NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

3 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 516
CSC WIRELESS, LLC 3
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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2026-09-17 516-301-4XXX 4000–4999Assigned CSC WIRELESS, LLC 425J NASSAUZN01 NY
2026-09-17 516-504-4XXX 4000–4999Assigned CSC WIRELESS, LLC 425J NASSAUZN01 NY
2026-09-17 516-550-6XXX 6000–6999Assigned CSC WIRELESS, LLC 425J NASSAUZN01 NY
2019-12-30 516-916-3XXX 3000–3999Assigned CSC WIRELESS, LLC 425J NASSAUZN01 NY
2019-12-17 516-836-0XXX 0000–0999Assigned CSC WIRELESS, LLC 425J NASSAUZN03 NY
2019-12-17 516-836-1XXX 1000–1999Assigned CSC WIRELESS, LLC 425J NASSAUZN03 NY
2019-12-17 516-836-2XXX 2000–2999Assigned CSC WIRELESS, LLC 425J NASSAUZN03 NY
2019-12-17 516-836-3XXX 3000–3999Assigned CSC WIRELESS, LLC 425J NASSAUZN03 NY
2019-12-17 516-836-4XXX 4000–4999Assigned CSC WIRELESS, LLC 425J NASSAUZN03 NY
2019-12-17 516-836-5XXX 5000–5999Assigned CSC WIRELESS, LLC 425J NASSAUZN03 NY
2019-12-17 516-836-6XXX 6000–6999Assigned CSC WIRELESS, LLC 425J NASSAUZN03 NY
2019-12-17 516-836-7XXX 7000–7999Assigned CSC WIRELESS, LLC 425J NASSAUZN03 NY
2019-12-17 516-836-8XXX 8000–8999Assigned CSC WIRELESS, LLC 425J NASSAUZN03 NY
2019-12-17 516-836-9XXX 9000–9999Assigned CSC WIRELESS, LLC 425J NASSAUZN03 NY
2019-06-17 516-709-4XXX 4000–4999Assigned CSC WIRELESS, LLC 425J NASSAUZN04 NY
2019-06-17 516-709-5XXX 5000–5999Assigned CSC WIRELESS, LLC 425J NASSAUZN04 NY
2019-06-17 516-709-6XXX 6000–6999Assigned CSC WIRELESS, LLC 425J NASSAUZN04 NY
2019-06-17 516-709-7XXX 7000–7999Assigned CSC WIRELESS, LLC 425J NASSAUZN04 NY
2019-06-17 516-953-7XXX 7000–7999Assigned CSC WIRELESS, LLC 425J NASSAUZN04 NY
2019-06-03 516-916-0XXX 0000–0999Assigned CSC WIRELESS, LLC 425J NASSAUZN01 NY
2019-06-03 516-916-1XXX 1000–1999Assigned CSC WIRELESS, LLC 425J NASSAUZN01 NY
2019-06-03 516-916-8XXX 8000–8999Assigned CSC WIRELESS, LLC 425J NASSAUZN01 NY
2019-05-13 516-709-0XXX 0000–0999Assigned CSC WIRELESS, LLC 425J NASSAUZN04 NY
2019-05-13 516-709-1XXX 1000–1999Assigned CSC WIRELESS, LLC 425J NASSAUZN04 NY
2019-05-13 516-709-8XXX 8000–8999Assigned CSC WIRELESS, LLC 425J NASSAUZN04 NY
2019-05-13 516-709-9XXX 9000–9999Assigned CSC WIRELESS, LLC 425J NASSAUZN04 NY
2019-04-04 516-709-2XXX 2000–2999Assigned CSC WIRELESS, LLC 425J NASSAUZN04 NY

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.