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 215
SPOK, INC. 36
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
— 215-212 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-213 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-265 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-270 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN4 PA
— 215-296 not yet reported which blocks → SPOK, INC. 6630 PHPHSBZN40 PA
— 215-306 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-308 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-312 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-314 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-319 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-363 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-373 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-374 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-401 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-404 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-414 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-415 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-505 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-506 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-522 not yet reported which blocks → SPOK, INC. 6630 PHPHSBZN38 PA
— 215-524 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-577 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN2 PA
— 215-691 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-705 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN4 PA
— 215-719 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-759 not yet reported which blocks → SPOK, INC. 6630 DOYLESTOWN PA
— 215-812 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-818 not yet reported which blocks → SPOK, INC. 6630 PHPHSBZN40 PA
— 215-819 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-838 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-865 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-889 not yet reported which blocks → SPOK, INC. 6630 PHPHSBZN42 PA
— 215-894 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN2 PA
— 215-899 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN2 PA
— 215-905 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA
— 215-998 not yet reported which blocks → SPOK, INC. 6630 PHLDLPHZN1 PA

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.