NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 781
VERIZON NEW ENGLAND INC. 232
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 92
PAETEC ITEL, LLC 69
LEVEL 3 COMMUNICATIONS, LLC - MA 59
TC SYSTEMS, INC. 57
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 NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 781-874 3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J MEDFORD MA
— 781-875 3XXX7XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J HINGHAM MA
— 781-876 0XXX2XXX9XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 WAKEFIELD MA
— 781-878 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 ROCKLAND MA
— 781-880 not yet reported which blocks → MA
— 781-881 2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 NORWOOD MA
— 781-883 none assigned yet which blocks → METROPCS, INC. 5562 WOBURN MA
— 781-884 7XXX8XXX which blocks → PAETEC ITEL, LLC 829J BRAINTREE MA
— 781-885 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J RANDOLPH MA
— 781-888 7XXX which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 RANDOLPH MA
— 781-890 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WALTHAM MA
— 781-891 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WALTHAM MA
— 781-892 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BURLINGTON MA
— 781-893 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WALTHAM MA
— 781-894 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WALTHAM MA
— 781-895 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WALTHAM MA
— 781-896 none assigned yet which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E BURLINGTON MA
— 781-897 none assigned yet which blocks → PAETEC ITEL, LLC 829J WOBURN MA
— 781-898 0XXX1XXX3XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H NEEDHAM MA
— 781-899 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WALTHAM MA
— 781-900 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 XXXXXXXXXX MA
— 781-902 8XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WALTHAM MA
— 781-904 none assigned yet which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WOBURN MA
— 781-906 0XXX1XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WALTHAM MA
— 781-907 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WALTHAM MA
— 781-908 1XXX8XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E HINGHAM MA
— 781-910 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LYNN MA
— 781-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MA
— 781-912 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MALDEN MA
— 781-915 4XXX7XXX8XXX9XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DEDHAM MA
— 781-916 8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J WALTHAM MA
— 781-917 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BRAINTREE MA
— 781-920 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WALTHAM MA
— 781-922 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 REVERE MA
— 781-923 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J COHASSET MA
— 781-924 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → COMCAST IP PHONE, LLC 318J HANOVER MA
— 781-925 7XXX which blocks → VERIZON NEW ENGLAND INC. 9102 HULL MA
— 781-926 1XXX2XXX3XXX5XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BRAINTREE MA
— 781-927 3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J WEYMOUTH MA
— 781-928 8XXX which blocks → PAETEC ITEL, LLC 829J WAKEFIELD MA
— 781-930 6XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BRAINTREE MA
— 781-931 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BOSTON MA
— 781-932 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WOBURN MA
— 781-933 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WOBURN MA
— 781-934 3XXX4XXX which blocks → VERIZON NEW ENGLAND INC. 9102 DUXBURY MA
— 781-935 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WOBURN MA
— 781-936 2XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J KINGSTON MA
— 781-937 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WOBURN MA
— 781-938 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WOBURN MA
— 781-939 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WOBURN MA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.