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 302
CORETEL DELAWARE, INC. - DE 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
2018-06-11 302-445 0–9 XXXall 10 · 3 holders which blocks → CORETEL DELAWARE, INC. - DE 1991 BRIDGEVL DE
2018-06-11 302-446 0–9 XXXall 10 · 3 holders which blocks → CORETEL DELAWARE, INC. - DE 1991 CAMDEN DE
2018-06-11 302-447 0–9 XXXall 10 · 2 holders which blocks → CORETEL DELAWARE, INC. - DE 1991 GEORGETOWN DE
2018-06-11 302-459 0–9 XXXall 10 · 4 holders which blocks → CORETEL DELAWARE, INC. - DE 1991 MILFORD DE
2018-06-11 302-461 0–9 XXXwhole prefix which blocks → CORETEL DELAWARE, INC. - DE 1991 NEWARK DE
2018-06-11 302-471 0–9 XXXall 10 · 5 holders which blocks → CORETEL DELAWARE, INC. - DE 1991 SMYRNA DE
2018-06-05 302-842 0–9 XXXall 10 · 4 holders which blocks → CORETEL DELAWARE, INC. - DE 1991 WILMINGTON DE
2018-06-04 302-639 0–9 XXXall 10 · 3 holders which blocks → CORETEL DELAWARE, INC. - DE 1991 NEW CASTLE DE
2001-03-09 302-780 not yet reported which blocks → CORETEL DELAWARE, INC. - DE 1991 DELMAR DE
2001-03-09 302-782 not yet reported which blocks → CORETEL DELAWARE, INC. - DE 1991 DOVER DE
2001-03-09 302-783 not yet reported which blocks → CORETEL DELAWARE, INC. - DE 1991 LEWES DE
2001-03-09 302-787 not yet reported which blocks → CORETEL DELAWARE, INC. - DE 1991 NEW CASTLE DE
2001-03-09 302-788 not yet reported which blocks → CORETEL DELAWARE, INC. - DE 1991 SELBYVILLE DE
2001-03-09 302-789 not yet reported which blocks → CORETEL DELAWARE, INC. - DE 1991 WILMINGTON DE
— 302-418 0–9 XXXwhole prefix which blocks → CORETEL DELAWARE, INC. - DE 1991 HOLLY OAK DE
— 302-460 0–9 XXXwhole prefix which blocks → CORETEL DELAWARE, INC. - DE 1991 DELAWARECY DE

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.