NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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 318
CP-TEL NETWORK SERVICES, INC. - LA 16
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
2004-05-19 318-520 0–9 XXXall 10 · 4 holders which blocks → CP-TEL NETWORK SERVICES, INC. - LA 1762 CASTOR LA
2004-05-19 318-808 0XXX1XXX2XXX7XXX8XXX · 4 holders which blocks → CP-TEL NETWORK SERVICES, INC. - LA 1762 FLORIEN LA
2004-05-19 318-824 0–9 XXXall 10 · 5 holders which blocks → CP-TEL NETWORK SERVICES, INC. - LA 1762 ZWOLLE LA
2004-05-19 318-887 0XXX1XXX2XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CP-TEL NETWORK SERVICES, INC. - LA 1762 CONVERSE LA
2004-05-19 318-889 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → CP-TEL NETWORK SERVICES, INC. - LA 1762 HORNBECK LA
2004-05-19 318-906 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → CP-TEL NETWORK SERVICES, INC. - LA 1762 LOGANSPORT LA
2004-05-19 318-931 0–9 XXXall 10 · 5 holders which blocks → CP-TEL NETWORK SERVICES, INC. - LA 1762 ROBELINE LA
2001-12-19 318-234 not yet reported which blocks → CP-TEL NETWORK SERVICES, INC. - LA 1762 HOMER LA
2001-12-19 318-236 not yet reported which blocks → CP-TEL NETWORK SERVICES, INC. - LA 1762 SHREVEPORT LA
2001-12-19 318-238 not yet reported which blocks → CP-TEL NETWORK SERVICES, INC. - LA 1762 NATCHITCHS LA
2001-12-19 318-270 not yet reported which blocks → CP-TEL NETWORK SERVICES, INC. - LA 1762 MANSFIELD LA
2001-12-19 318-271 not yet reported which blocks → CP-TEL NETWORK SERVICES, INC. - LA 1762 COUSHATTA LA
2001-12-19 318-273 not yet reported which blocks → CP-TEL NETWORK SERVICES, INC. - LA 1762 MANY LA
2001-12-19 318-291 not yet reported which blocks → CP-TEL NETWORK SERVICES, INC. - LA 1762 MINDEN LA
2001-12-19 318-293 not yet reported which blocks → CP-TEL NETWORK SERVICES, INC. - LA 1762 SALINE LA
2001-12-19 318-365 not yet reported which blocks → CP-TEL NETWORK SERVICES, INC. - LA 1762 ARCADIA LA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.