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 718
VERIZON NEW YORK, INC. 555
TC SYSTEMS, INC. - NY 43
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 37
LEVEL 3 COMMUNICATIONS, LLC - NY 25
NEW CINGULAR WIRELESS PCS, LLC - DC 19
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
— 718-567 5XXX6XXX which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN06 NY
— 718-568 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TC SYSTEMS, INC. - NY 7140 NWYRCYZN14 NY
— 718-569 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TC SYSTEMS, INC. - NY 7140 NWYRCYZN15 NY
— 718-570 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TC SYSTEMS, INC. - NY 7140 NWYRCYZN10 NY
— 718-571 8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN06 NY
— 718-572 not yet reported which blocks → AMERICAN NETWORK, INC. 8667 NWYRCYZN14 NY
— 718-573 0XXX1XXX3XXX6XXX7XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN06 NY
— 718-574 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN06 NY
— 718-575 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN10 NY
— 718-577 0XXX1XXX2XXX5XXX7XXX8XXX · 3 holders which blocks → RCN TELECOM SERVICES, INC. - NY 7353 NWYRCYZN10 NY
— 718-579 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN03 NY
— 718-580 not yet reported which blocks → UNITED CELLULAR & PAGING, INC. 2709 NWYRCYZN04 NY
— 718-581 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN05 NY
— 718-583 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN03 NY
— 718-584 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN03 NY
— 718-585 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN03 NY
— 718-586 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NWYRCYZN12 NY
— 718-587 2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NWYRCYZN14 NY
— 718-588 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN03 NY
— 718-589 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN03 NY
— 718-590 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN03 NY
— 718-591 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN10 NY
— 718-592 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN08 NY
— 718-593 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NWYRCYZN08 NY
— 718-595 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN08 NY
— 718-596 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN06 NY
— 718-597 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN04 NY
— 718-598 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → RCN TELECOM SERVICES, INC. - NY 7353 NWYRCYZN12 NY
— 718-599 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN06 NY
— 718-601 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN05 NY
— 718-602 3XXX4XXX6XXX which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN06 NY
— 718-603 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN14 NY
— 718-604 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN06 NY
— 718-605 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN15 NY
— 718-606 3XXX4XXX5XXX7XXX · 3 holders which blocks → RCN TELECOM SERVICES, INC. - NY 7353 NWYRCYZN08 NY
— 718-608 2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN15 NY
— 718-609 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN06 NY
— 718-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 718-613 1XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN06 NY
— 718-614 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN07 NY
— 718-615 5XXX which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN07 NY
— 718-616 8XXX9XXX which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN07 NY
— 718-617 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN03 NY
— 718-618 0–9 XXXall 10 · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN03 NY
— 718-619 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NWYRCYZN14 NY
— 718-620 6XXX7XXX9XXX which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN03 NY
— 718-621 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN07 NY
— 718-622 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN06 NY
— 718-623 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN06 NY
— 718-624 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN06 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.