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 302
VERIZON DELAWARE, INC. 175
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
2014-09-02 302-310 0–9 XXXall 10 · 3 holders which blocks → VERIZON DELAWARE, INC. 9210 DOVER DE
2014-08-18 302-515 0–9 XXXall 10 · 6 holders which blocks → VERIZON DELAWARE, INC. 9210 GEORGETOWN DE
2012-10-17 302-203 0–9 XXXall 10 · 4 holders which blocks → VERIZON DELAWARE, INC. 9210 MIDDLETOWN DE
2005-04-25 302-543 0–9 XXXall 10 · 4 holders which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-210 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 XXXXXXXXXX DE
— 302-226 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 REHOBOTH DE
— 302-227 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 REHOBOTH DE
— 302-234 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 HOCKESSIN DE
— 302-235 3XXX8XXX9XXX · 3 holders which blocks → VERIZON DELAWARE, INC. 9210 HOCKESSIN DE
— 302-238 1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → VERIZON DELAWARE, INC. 9210 GUMBORO DE
— 302-239 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 HOCKESSIN DE
— 302-255 5XXX6XXX which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-266 1XXX2XXX4XXX · 3 holders which blocks → VERIZON DELAWARE, INC. 9210 NEWARK DE
— 302-282 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-283 9XXX which blocks → VERIZON DELAWARE, INC. 9210 NEWARK DE
— 302-284 5XXX6XXX7XXX · 3 holders which blocks → VERIZON DELAWARE, INC. 9210 FELTON DE
— 302-286 5XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON DELAWARE, INC. 9210 NEWARK DE
— 302-292 9XXX which blocks → VERIZON DELAWARE, INC. 9210 NEWARK DE
— 302-320 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-322 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 NEW CASTLE DE
— 302-323 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 NEW CASTLE DE
— 302-324 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 NEW CASTLE DE
— 302-325 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 NEW CASTLE DE
— 302-326 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 NEW CASTLE DE
— 302-327 0XXX1XXX4XXX6XXX8XXX9XXX · 5 holders which blocks → VERIZON DELAWARE, INC. 9210 NEW CASTLE DE
— 302-328 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 NEW CASTLE DE
— 302-335 2XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON DELAWARE, INC. 9210 FREDERICA DE
— 302-337 4XXX5XXX6XXX which blocks → VERIZON DELAWARE, INC. 9210 BRIDGEVL DE
— 302-349 1XXX2XXX3XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON DELAWARE, INC. 9210 GREENWOOD DE
— 302-366 2XXX3XXX4XXX9XXX · 4 holders which blocks → VERIZON DELAWARE, INC. 9210 NEWARK DE
— 302-368 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 NEWARK DE
— 302-369 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 NEWARK DE
— 302-376 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 MIDDLETOWN DE
— 302-378 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 MIDDLETOWN DE
— 302-391 0XXX1XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON DELAWARE, INC. 9210 NEWARK DE
— 302-395 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 NEW CASTLE DE
— 302-398 2XXX which blocks → VERIZON DELAWARE, INC. 9210 HARRINGTON DE
— 302-421 0XXX which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-422 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 MILFORD DE
— 302-424 9XXX which blocks → VERIZON DELAWARE, INC. 9210 MILFORD DE
— 302-425 1XXX8XXX9XXX · 3 holders which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-426 3XXX which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-427 5XXX which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-428 9XXX which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-429 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-430 1XXX2XXX3XXX4XXX6XXX8XXX9XXX which blocks → VERIZON DELAWARE, INC. 9210 MILFORD DE
— 302-432 not yet reported which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-433 0XXX1XXX3XXX6XXX7XXX9XXX · 5 holders which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-434 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
— 302-436 3XXX which blocks → VERIZON DELAWARE, INC. 9210 SELBYVILLE DE

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.