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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2019-05-01 585-504-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E ROCHESTER NY
2019-04-29 585-252-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E PAVILION NY
2019-04-22 585-416-5XXX 5000–5999Assigned ONVOY, LLC- NY 384C WATERPORT NY
2019-04-22 585-883-2XXX 2000–2999Assigned ONVOY, LLC- NY 384C MT MORRIS NY
2019-04-11 585-673-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 EROCHESTER NY
2019-03-26 585-268-2XXX 2000–2999Assigned CORETEL NEW YORK, INC. - NY 1215 BELMONT NY
2019-03-26 585-322-8XXX 8000–8999Assigned CORETEL NEW YORK, INC. - NY 1215 BLISS NY
2019-03-26 585-466-9XXX 9000–9999Assigned CORETEL NEW YORK, INC. - NY 1215 ANGELICA NY
2019-03-26 585-536-3XXX 3000–3999Assigned CORETEL NEW YORK, INC. - NY 1215 BATAVIA NY
2019-03-26 585-547-4XXX 4000–4999Assigned CORETEL NEW YORK, INC. - NY 1215 DARIEN NY
2019-03-26 585-548-3XXX 3000–3999Assigned CORETEL NEW YORK, INC. - NY 1215 BYRON NY
2019-03-26 585-567-3XXX 3000–3999Assigned CORETEL NEW YORK, INC. - NY 1215 FILLMORE NY
2019-03-26 585-628-6XXX 6000–6999Assigned CORETEL NEW YORK, INC. - NY 1215 BELFAST NY
2019-03-26 585-652-6XXX 6000–6999Assigned CORETEL NEW YORK, INC. - NY 1215 EASTAURORA NY
2019-03-26 585-676-2XXX 2000–2999Assigned CORETEL NEW YORK, INC. - NY 1215 FRANKLINVL NY
2019-03-26 585-684-2XXX 2000–2999Assigned CORETEL NEW YORK, INC. - NY 1215 HOLLEY NY
2019-03-26 585-735-2XXX 2000–2999Assigned CORETEL NEW YORK, INC. - NY 1215 MIDDLEPORT NY
2019-03-26 585-774-6XXX 6000–6999Assigned CORETEL NEW YORK, INC. - NY 1215 ALBION NY
2019-03-26 585-937-8XXX 8000–8999Assigned CORETEL NEW YORK, INC. - NY 1215 ALDEN NY
2019-03-25 585-577-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E CANANDAGUA NY
2019-03-25 585-855-5XXX 5000–5999Assigned TERRA NOVA TELECOM INC. 145J BOLIVAR NY
2019-03-25 585-877-7XXX 7000–7999Assigned TERRA NOVA TELECOM INC. 145J ROCHESTER NY
2019-02-15 585-842-5XXX 5000–5999Assigned CORETEL NEW YORK, INC. - NY 1215 LYNDONVL NY
2019-02-15 585-940-0XXX 0000–0999Assigned CORETEL NEW YORK, INC. - NY 1215 LEICESTER NY
2019-02-15 585-990-0XXX 0000–0999Assigned CORETEL NEW YORK, INC. - NY 1215 NUNDA NY
2019-02-14 585-304-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 OAKFIELD NY
2019-02-13 585-504-0XXX 0000–0999Assigned PEERLESS NETWORK OF NEW YORK, LLC - NY 155E ROCHESTER NY
2019-02-04 585-504-5XXX 5000–5999Assigned METROPCS, INC. 5562 ROCHESTER NY
2018-12-31 585-430-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FAIRPORT NY
2018-12-28 585-312-4XXX 4000–4999Assigned TELNYX LLC 073H ELBA NY
2018-12-28 585-386-5XXX 5000–5999Assigned TELNYX LLC 073H ANGELICA NY
2018-12-28 585-457-4XXX 4000–4999Assigned TELNYX LLC 073H JAVA NY
2018-12-28 585-628-5XXX 5000–5999Assigned TELNYX LLC 073H BELFAST NY
2018-12-28 585-676-0XXX 0000–0999Assigned TELNYX LLC 073H FRANKLINVL NY
2018-12-26 585-504-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2018-12-14 585-439-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HENRIETTA NY
2018-11-28 585-312-7XXX 7000–7999Assigned PEERLESS NETWORK OF NEW YORK, LLC - NY 155E ELBA NY
2018-11-27 585-560-0XXX 0000–0999Assigned ONVOY, LLC- NY 384C MEDINA NY
2018-11-27 585-560-1XXX 1000–1999Assigned ONVOY, LLC- NY 384C MEDINA NY
2018-11-21 585-430-6XXX 6000–6999Assigned PEERLESS NETWORK OF NEW YORK, LLC - NY 155E FAIRPORT NY
2018-11-21 585-446-9XXX 9000–9999Assigned PEERLESS NETWORK OF NEW YORK, LLC - NY 155E W WEBSTER NY
2018-11-21 585-867-8XXX 8000–8999Assigned TC SYSTEMS, INC. - NY 7140 ROCHESTER NY
2018-11-20 585-505-0XXX 0000–0999Assigned EMPIRE LONG DISTANCE CORPORATION 087H ROCHESTER NY
2018-11-16 585-575-0XXX 0000–0999Assigned ONVOY, LLC- NY 384C HONEOYE NY
2018-11-16 585-575-1XXX 1000–1999Assigned ONVOY, LLC- NY 384C HONEOYE NY
2018-11-16 585-595-0XXX 0000–0999Assigned ONVOY, LLC- NY 384C HEMLOCK NY
2018-11-16 585-595-1XXX 1000–1999Assigned ONVOY, LLC- NY 384C HEMLOCK NY
2018-11-15 585-304-4XXX 4000–4999Assigned ONVOY, LLC- NY 384C OAKFIELD NY
2018-11-15 585-304-9XXX 9000–9999Assigned ONVOY, LLC- NY 384C OAKFIELD NY
2018-11-15 585-312-8XXX 8000–8999Assigned ONVOY, LLC- NY 384C ELBA 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.