NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

14 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2004-08-05 413-648-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BERNARDSTN MA
2004-08-05 413-853-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 ASHFIELD MA
2004-08-05 413-994-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CHARLEMONT MA
2004-07-14 413-369-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J CONWAY MA
2004-07-14 413-422-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J MILLERSFLS MA
2004-07-07 413-265-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HOLYOKE MA
2004-07-07 413-454-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WESTFIELD MA
2004-07-07 413-668-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 PALMER MA
2004-06-29 413-728-8XXX 8000–8999Assigned RINGSQUARED TELECOM LLC 3849 LENOX MA
2004-06-10 413-648-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J BERNARDSTN MA
2004-06-09 413-636-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SPRINGFLD MA
2004-06-09 413-652-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NORTHADAMS MA
2004-05-28 413-322-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J HOLYOKE MA
2004-05-28 413-387-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J NORTHAMPTN MA
2004-05-21 413-320-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NORTHAMPTN MA
2004-05-19 413-824-8XXX 8000–8999Assigned METROPCS, INC. 5562 GREENFIELD MA
2004-05-14 413-212-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PITTSFIELD MA
2004-04-16 413-687-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 AMHERST MA
2004-04-16 413-687-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 AMHERST MA
2004-04-06 413-977-2XXX 2000–2999Assigned METROPCS, INC. 5562 WESTFIELD MA
2004-04-05 413-841-7XXX 7000–7999Assigned METROPCS, INC. 5562 PITTSFIELD MA
2004-03-11 413-203-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 EASTHAMPTN MA
2004-03-11 413-566-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 HAMPDEN MA
2004-03-11 413-725-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WARE MA
2004-03-11 413-754-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LONGMEADOW MA
2004-03-11 413-862-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 RUSSELL MA
2004-03-09 413-207-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J HUNTINGTON MA
2004-03-01 413-203-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J EASTHAMPTN MA
2004-03-01 413-207-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J HUNTINGTON MA
2004-03-01 413-225-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J NORTHFIELD MA
2004-03-01 413-230-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J AMHERST MA
2004-03-01 413-247-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J HATFIELD MA
2004-03-01 413-268-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J WILLIAMSBG MA
2004-03-01 413-315-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J HOLYOKE MA
2004-03-01 413-341-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J NORTHAMPTN MA
2004-03-01 413-354-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J CHESTER MA
2004-03-01 413-357-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J GRANVILLE MA
2004-03-01 413-367-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J MONTAGUE MA
2004-03-01 413-397-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SO DEERFLD MA
2004-03-01 413-475-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J GREENFIELD MA
2004-03-01 413-489-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SHELBUNFLS MA
2004-03-01 413-642-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WESTFIELD MA
2004-03-01 413-648-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BERNARDSTN MA
2004-03-01 413-754-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J LONGMEADOW MA
2004-03-01 413-863-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J TURNERSFLS MA
2004-03-01 413-998-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SOUTHWICK MA
2004-02-12 413-884-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WILLIAMSTN MA
2004-02-10 413-214-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA
2004-02-10 413-214-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA
2004-02-10 413-214-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SPRINGFLD MA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.