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 631
VERIZON NEW YORK, INC. 230
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 64
OMNIPOINT COMMUNICATIONS, INC. - NY 55
CABLEVISION LIGHTPATH, INC. - NY 55
LEVEL 3 COMMUNICATIONS, LLC - NY 53
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
— 631-922 8XXX which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 BRENTWOOD NY
— 631-923 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → AT&T - LOCAL 7421 HUNTINGTON NY
— 631-924 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 YAPHANK NY
— 631-925 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NORTHPORT NY
— 631-927 4XXX7XXX · 2 holders which blocks → AT&T - LOCAL 7421 FARMINGDL NY
— 631-928 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 PTJEFFERSN NY
— 631-929 2XXX7XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 WADING RIV NY
— 631-930 1XXX2XXX3XXX4XXX5XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J CENTRAISLP NY
— 631-935 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HUNTINGTON NY
— 631-936 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 XXXXXXXXXX NY
— 631-940 none assigned yet which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 DEER PARK NY
— 631-941 6XXX7XXX8XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 STONYBROOK NY
— 631-944 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J HUNTINGTON NY
— 631-947 2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 BELLPORT NY
— 631-948 not yet reported which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 BRENTWOOD NY
— 631-950 not yet reported which blocks → NY
— 631-951 7XXX8XXX which blocks → VERIZON NEW YORK, INC. 9104 BRENTWOOD NY
— 631-952 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 BRENTWOOD NY
— 631-953 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 RIVERHEAD NY
— 631-954 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E BAY SHORE NY
— 631-955 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 DEER PARK NY
— 631-956 2XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 LINDENHST NY
— 631-957 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 LINDENHST NY
— 631-958 not yet reported which blocks → NY
— 631-959 not yet reported which blocks → NY
— 631-960 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TC SYSTEMS, INC. - NY 7140 ISLIP NY
— 631-961 4XXX6XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 BABYLON NY
— 631-962 7XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 FARMINGDL NY
— 631-963 4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 CENTRAISLP NY
— 631-964 4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 DEER PARK NY
— 631-967 not yet reported which blocks → PAETEC ITEL, LLC 829J BRENTWOOD NY
— 631-968 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 BAY SHORE NY
— 631-969 4XXX6XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 BAY SHORE NY
— 631-971 1XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J W COMMACK NY
— 631-973 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → TC SYSTEMS, INC. - NY 7140 KINGS PARK NY
— 631-976 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 631-978 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 PTJEFFERSN NY
— 631-979 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SMITHTOWN NY
— 631-980 not yet reported which blocks → ONVOY, LLC- NY 384C COMMACK NY
— 631-981 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 RONKONKOMA NY
— 631-982 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 SMITHTOWN NY
— 631-983 2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 BABYLON NY
— 631-987 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
— 631-989 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H RIVERHEAD NY
— 631-991 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TC SYSTEMS, INC. - NY 7140 LINDENHST NY
— 631-993 0–9 XXXall 10 · 9 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 COMMACK NY
— 631-995 2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 YAPHANK NY
— 631-996 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 QUOGUE NY
— 631-998 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 WESTHAMPTN NY

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.