NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 708
SPOK, INC. 26
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
— 708-241 not yet reported which blocks → SPOK, INC. 6630 LA GRANGE IL
— 708-242 not yet reported which blocks → SPOK, INC. 6630 BELLWOOD IL
— 708-266 not yet reported which blocks → SPOK, INC. 6630 MAYWOOD IL
— 708-276 not yet reported which blocks → SPOK, INC. 6630 SUMMIT IL
— 708-281 not yet reported which blocks → SPOK, INC. 6630 NORTHBROOK IL
— 708-313 not yet reported which blocks → SPOK, INC. 6630 LA GRANGE IL
— 708-324 not yet reported which blocks → SPOK, INC. 6630 MAYWOOD IL
— 708-376 not yet reported which blocks → SPOK, INC. 6630 NORTHBROOK IL
— 708-379 not yet reported which blocks → SPOK, INC. 6630 BELLWOOD IL
— 708-440 not yet reported which blocks → SPOK, INC. 6630 BLUEISLAND IL
— 708-454 not yet reported which blocks → SPOK, INC. 6630 NORTHBROOK IL
— 708-461 not yet reported which blocks → SPOK, INC. 6630 NORTHBROOK IL
— 708-463 not yet reported which blocks → SPOK, INC. 6630 LA GRANGE IL
— 708-561 not yet reported which blocks → SPOK, INC. 6630 LA GRANGE IL
— 708-592 not yet reported which blocks → SPOK, INC. 6630 LA GRANGE IL
— 708-619 not yet reported which blocks → SPOK, INC. 6630 BLUEISLAND IL
— 708-626 not yet reported which blocks → SPOK, INC. 6630 BLUEISLAND IL
— 708-644 not yet reported which blocks → SPOK, INC. 6630 NORTHBROOK IL
— 708-750 not yet reported which blocks → SPOK, INC. 6630 ORLAND IL
— 708-812 not yet reported which blocks → SPOK, INC. 6630 LA GRANGE IL
— 708-823 not yet reported which blocks → SPOK, INC. 6630 LA GRANGE IL
— 708-861 not yet reported which blocks → SPOK, INC. 6630 LA GRANGE IL
— 708-936 not yet reported which blocks → SPOK, INC. 6630 CHICAGOHTS IL
— 708-962 not yet reported which blocks → SPOK, INC. 6630 MONEE IL
— 708-984 not yet reported which blocks → SPOK, INC. 6630 MONEE IL
— 708-999 not yet reported which blocks → SPOK, INC. 6630 MAYWOOD IL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.