NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

14 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 413
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6
BANDWIDTH.COM CLEC, LLC - MA 5
NEW CINGULAR WIRELESS PCS, LLC - DC 1
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 1
AHOI LLC 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
2020-11-02 413-471-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H CHESTERFLD MA
2020-11-02 413-474-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H CHICOPEE MA
2020-11-02 413-486-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H ELONGMEDOW MA
2020-11-02 413-489-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H SHELBUNFLS MA
2020-11-02 413-500-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H MONROE BDG MA
2020-11-02 413-509-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H WILBRAHAM MA
2020-11-02 413-588-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H NORTHAMPTN MA
2020-11-02 413-595-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H HAMPDEN MA
2020-11-02 413-600-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H STOCKBDG MA
2020-11-02 413-613-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H DALTON MA
2020-11-02 413-628-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H ASHFIELD MA
2020-11-02 413-631-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H LUDLOW MA
2020-11-02 413-645-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H GREATBNGTN MA
2020-11-02 413-666-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H GRANVILLE MA
2020-11-02 413-676-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H TURNERSFLS MA
2020-11-02 413-688-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H MONSON MA
2020-11-02 413-701-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H BECKET MA
2020-11-02 413-712-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H SO DEERFLD MA
2020-11-02 413-722-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H CONWAY MA
2020-11-02 413-769-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H PITTSFIELD MA
2020-11-02 413-798-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H LONGMEADOW MA
2020-11-02 413-834-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H GREENFIELD MA
2020-11-02 413-865-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H LEE MA
2020-11-02 413-875-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H WESTFIELD MA
2020-11-02 413-881-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H LENOX MA
2020-11-02 413-889-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H W STOCKBDG MA
2020-11-02 413-944-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H BLANDFORD MA
2020-11-02 413-994-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H CHARLEMONT MA
2020-10-23 413-381-3XXX 3000–3999Assigned TWILIO INTERNATIONAL, INC. 506J SPRINGFLD MA
2020-10-19 413-368-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2020-10-19 413-368-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2020-10-19 413-368-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2020-10-19 413-368-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2020-09-23 413-412-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NORTHADAMS MA
2020-09-09 413-389-1XXX 1000–1999Assigned IP HORIZON LLC 515J SPRINGFLD MA
2020-09-08 413-261-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA
2020-09-08 413-261-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA
2020-09-08 413-263-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA
2020-09-08 413-263-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA
2020-09-08 413-263-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA
2020-09-08 413-263-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA
2020-09-08 413-263-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA
2020-09-08 413-290-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA
2020-09-08 413-292-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA
2020-09-08 413-292-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA
2020-09-08 413-292-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA
2020-09-08 413-292-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA
2020-09-08 413-292-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA
2020-09-08 413-361-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA
2020-09-08 413-361-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA

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.