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
2012-02-06 413-553-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D PITTSFIELD MA
2012-02-06 413-667-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D HUNTINGTON MA
2012-02-06 413-776-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D ADAMS MA
2012-02-06 413-887-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D HOLYOKE MA
2012-02-06 413-923-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D NORTHAMPTN MA
2012-02-03 413-234-4XXX 4000–4999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2012-02-03 413-234-5XXX 5000–5999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2012-02-03 413-234-6XXX 6000–6999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2012-02-03 413-234-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2012-02-03 413-234-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2012-02-03 413-234-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2012-02-03 413-285-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2012-02-03 413-342-3XXX 3000–3999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2012-01-12 413-217-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WILLIAMSTN MA
2012-01-10 413-887-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA 7103 HOLYOKE MA
2012-01-06 413-512-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J GREENFIELD MA
2012-01-05 413-369-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CONWAY MA
2011-12-13 413-357-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E GRANVILLE MA
2011-12-08 413-234-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SPRINGFLD MA
2011-12-06 413-259-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E AMHRSTFKLN MA
2011-12-02 413-362-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 AMHERST MA
2011-11-29 413-327-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E LEE MA
2011-11-18 413-642-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J WESTFIELD MA
2011-11-15 413-362-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2011-11-15 413-362-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2011-11-15 413-388-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHICOPEE MA
2011-11-04 413-449-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PITTSFIELD MA
2011-10-31 413-418-5XXX 5000–5999Assigned METROPCS, INC. 5562 PITTSFIELD MA
2011-10-31 413-418-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 PITTSFIELD MA
2011-10-17 413-475-5XXX 5000–5999Assigned METROPCS, INC. 5562 GREENFIELD MA
2011-10-14 413-686-2XXX 2000–2999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2011-10-14 413-686-3XXX 3000–3999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2011-10-14 413-686-5XXX 5000–5999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2011-10-14 413-686-6XXX 6000–6999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2011-10-14 413-686-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2011-10-14 413-799-0XXX 0000–0999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2011-10-14 413-799-1XXX 1000–1999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2011-10-14 413-799-2XXX 2000–2999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2011-10-14 413-799-3XXX 3000–3999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2011-10-14 413-799-4XXX 4000–4999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2011-10-14 413-799-5XXX 5000–5999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2011-10-14 413-799-7XXX 7000–7999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2011-10-14 413-799-8XXX 8000–8999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2011-10-14 413-799-9XXX 9000–9999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2011-10-11 413-437-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K HOLYOKE MA
2011-10-10 413-776-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J ADAMS MA
2011-10-05 413-355-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SPRINGFLD MA
2011-10-05 413-650-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 HOLYOKE MA
2011-09-28 413-672-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA 7103 NORTHADAMS MA
2011-09-28 413-717-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA 7103 GREATBNGTN 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.