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 438
Bell Mobility 178
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
2021-01-19 438-247 not yet reported which blocks → Bell Mobility 6574 Montreal —
2021-01-07 438-418 not yet reported which blocks → Bell Mobility 6574 Montreal —
2021-01-07 438-565 not yet reported which blocks → Bell Mobility 6574 Montreal —
2021-01-04 438-417 not yet reported which blocks → Bell Mobility 6574 Montreal —
2021-01-04 438-564 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-12-30 438-416 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-12-30 438-563 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-12-29 438-415 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-12-24 438-414 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-12-24 438-561 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-12-24 438-562 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-12-09 438-413 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-12-09 438-560 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-12-08 438-412 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-12-08 438-489 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-12-07 438-439 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-12-07 438-487 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-12-01 438-461 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-11-26 438-486 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-11-05 438-246 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-11-02 438-437 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-11-02 438-485 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-10-30 438-436 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-10-29 438-435 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-10-29 438-484 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-10-28 438-482 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-10-27 438-313 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-10-27 438-434 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-10-27 438-481 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-05-27 438-480 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-05-19 438-475 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-05-14 438-473 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-05-14 438-474 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-03-30 438-472 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-03-24 438-458 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-03-24 438-471 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-03-23 438-459 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-03-09 438-296 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-03-09 438-456 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-03-09 438-457 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-02-20 438-295 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-02-19 438-245 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-02-19 438-287 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-02-13 438-286 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-01-07 438-433 not yet reported which blocks → Bell Mobility 6574 Montreal —
2019-12-17 438-432 not yet reported which blocks → Bell Mobility 6574 Montreal —
2019-12-13 438-283 not yet reported which blocks → Bell Mobility 6574 Montreal —
2019-12-13 438-284 not yet reported which blocks → Bell Mobility 6574 Montreal —
2019-12-13 438-285 not yet reported which blocks → Bell Mobility 6574 Montreal —
2019-09-23 438-281 not yet reported which blocks → Bell Mobility 6574 Montreal —

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.