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
2014-06-13 413-801-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2014-06-11 413-930-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 SPRINGFLD MA
2014-06-04 413-517-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 NORTHAMPTN MA
2014-06-04 413-553-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 PITTSFIELD MA
2014-05-23 413-316-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SPRINGFLD MA
2014-05-19 413-310-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2014-05-19 413-310-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2014-05-19 413-404-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2014-05-19 413-404-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2014-05-19 413-404-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2014-05-15 413-404-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 AMHERST MA
2014-05-15 413-454-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WESTFIELD MA
2014-05-15 413-544-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 PALMER MA
2014-05-14 413-372-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 SPRINGFLD MA
2014-04-25 413-213-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BELCHERTN MA
2014-04-25 413-240-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CHICOPEE MA
2014-04-25 413-340-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WILLIAMSBG MA
2014-04-25 413-489-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SHELBUNFLS MA
2014-04-25 413-551-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E LENOX MA
2014-04-25 413-725-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WARE MA
2014-04-23 413-404-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2014-04-23 413-404-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2014-04-23 413-404-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2014-04-23 413-888-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHICOPEE MA
2014-04-23 413-923-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORTHAMPTN MA
2014-04-15 413-310-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SPRINGFLD MA
2014-04-15 413-310-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SPRINGFLD MA
2014-04-15 413-310-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SPRINGFLD MA
2014-04-10 413-449-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 PITTSFIELD MA
2014-04-10 413-813-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WARE MA
2014-04-03 413-407-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CHESTER MA
2014-03-31 413-998-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SOUTHWICK MA
2014-03-28 413-642-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WESTFIELD MA
2014-03-13 413-854-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GREATBNGTN MA
2014-03-12 413-672-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORTHADAMS MA
2014-03-07 413-404-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2014-03-07 413-404-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2014-03-07 413-735-3XXX 3000–3999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2014-03-07 413-821-5XXX 5000–5999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2014-02-28 413-224-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E ELONGMEDOW MA
2014-02-28 413-296-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CHESTERFLD MA
2014-02-28 413-337-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CHARLEMONT MA
2014-02-28 413-344-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E PITTSFIELD MA
2014-02-28 413-349-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E HATFIELD MA
2014-02-28 413-353-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E HOUSATONIC MA
2014-02-28 413-400-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E MONTAGUE MA
2014-02-28 413-424-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E MONROE BDG MA
2014-02-28 413-475-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E GREENFIELD MA
2014-02-28 413-591-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E GREATBNGTN MA
2014-02-28 413-685-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E HUNTINGTON 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.