NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

5 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 585
EXIANT COMMUNICATIONS LLC 3
TC SYSTEMS, INC. - NY 1
NEW CINGULAR WIRELESS PCS, LLC - DC 1
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
2018-10-11 585-439-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HENRIETTA NY
2018-10-01 585-470-0XXX 0000–0999Assigned NUSO, LLC 551G ROCHESTER NY
2018-10-01 585-470-1XXX 1000–1999Assigned NUSO, LLC 551G ROCHESTER NY
2018-09-28 585-470-4XXX 4000–4999Assigned METROPCS, INC. 5562 ROCHESTER NY
2018-09-28 585-470-5XXX 5000–5999Assigned METROPCS, INC. 5562 ROCHESTER NY
2018-09-28 585-470-6XXX 6000–6999Assigned METROPCS, INC. 5562 ROCHESTER NY
2018-09-24 585-304-8XXX 8000–8999Assigned PEERLESS NETWORK OF NEW YORK, LLC - NY 155E OAKFIELD NY
2018-09-18 585-628-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E BELFAST NY
2018-09-13 585-382-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E LEICESTER NY
2018-09-05 585-470-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 ROCHESTER NY
2018-09-04 585-440-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E CHURCHVL NY
2018-08-30 585-470-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2018-08-27 585-308-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E LE ROY NY
2018-08-27 585-332-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E LYNDONVL NY
2018-08-27 585-537-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2018-08-27 585-537-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2018-08-24 585-252-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E PAVILION NY
2018-08-24 585-460-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E CALEDONIA NY
2018-08-20 585-558-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E WARSAW NY
2018-08-20 585-667-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E WEBSTER NY
2018-08-10 585-304-3XXX 3000–3999Assigned ONVOY, LLC- NY 384C OAKFIELD NY
2018-08-10 585-312-3XXX 3000–3999Assigned ONVOY, LLC- NY 384C ELBA NY
2018-08-10 585-800-6XXX 6000–6999Assigned ONVOY, LLC- NY 384C BOLIVAR NY
2018-08-10 585-900-2XXX 2000–2999Assigned ONVOY, LLC- NY 384C CHAFFEE NY
2018-08-10 585-999-8XXX 8000–8999Assigned ONVOY, LLC- NY 384C JAVA NY
2018-08-03 585-450-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2018-08-02 585-536-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BATAVIA NY
2018-07-31 585-386-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E ANGELICA NY
2018-07-30 585-450-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2018-07-30 585-450-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2018-07-23 585-439-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HENRIETTA NY
2018-07-19 585-450-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2018-07-17 585-450-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 ROCHESTER NY
2018-07-11 585-450-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2018-07-11 585-456-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2018-07-11 585-584-4XXX 4000–4999Assigned ONVOY, LLC- NY 384C PAVILION NY
2018-07-11 585-667-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WEBSTER NY
2018-07-11 585-673-7XXX 7000–7999Assigned ONVOY, LLC- NY 384C EROCHESTER NY
2018-06-18 585-294-0XXX 0000–0999Assigned ONVOY, LLC- NY 384C CALEDONIA NY
2018-06-18 585-299-9XXX 9000–9999Assigned ONVOY, LLC- NY 384C CHURCHVL NY
2018-06-11 585-450-0XXX 0000–0999Assigned VONAGE AMERICA LLC 197D ROCHESTER NY
2018-06-11 585-547-5XXX 5000–5999Assigned ONVOY, LLC- NY 384C DARIEN NY
2018-06-11 585-567-7XXX 7000–7999Assigned ONVOY, LLC- NY 384C FILLMORE NY
2018-06-11 585-597-7XXX 7000–7999Assigned ONVOY, LLC- NY 384C CORFU NY
2018-06-07 585-257-2XXX 2000–2999Assigned ONVOY, LLC- NY 384C HOLCOMB NY
2018-05-10 585-446-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E W WEBSTER NY
2018-05-10 585-531-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E NAPLES NY
2018-05-10 585-537-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2018-05-10 585-805-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E EASTAURORA NY
2018-05-10 585-867-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY

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.