NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
— 835-950 not yet reported which blocks → PA
— 835-958 not yet reported which blocks → PA
— 835-959 not yet reported which blocks → PA
— 835-976 not yet reported which blocks → PA
— 837-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 837-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 837-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 837-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 837-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST CA
— 837-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 837-700 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 837-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 837-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 837-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 837-950 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 837-958 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 837-959 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 837-976 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 838-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 838-213 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC- NY 384C GLENSFALLS NY
— 838-216 0–9 XXXwhole prefix which blocks → TC SYSTEMS, INC. - NY 7140 ALBANY NY
— 838-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 838-330 0XXX3XXX · 2 holders which blocks → PEERING HUB, INC. - NY 818H FORT PLAIN NY
— 838-337 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → IP HORIZON LLC 515J HOOSICKFLS NY
— 838-339 0–9 XXXall 10 · 2 holders which blocks → PEERING HUB, INC. - NY 818H JOHNSTOWN NY
— 838-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 838-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 838-550 not yet reported which blocks → NY
— 838-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST NY
— 838-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 838-700 not yet reported which blocks → NY
— 838-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 838-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 838-837 4XXX9XXX · 2 holders which blocks → PEERING HUB, INC. - NY 818H BLUEMTLAKE NY
— 838-850 not yet reported which blocks → NY
— 838-881 1XXX9XXX · 2 holders which blocks → PEERING HUB, INC. - NY 818H NORTHCREEK NY
— 838-888 0–9 XXXwhole prefix which blocks → ONVOY, LLC- NY 384C HOOSICKFLS NY
— 838-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 838-950 not yet reported which blocks → NY
— 838-958 not yet reported which blocks → NY
— 838-959 not yet reported which blocks → NY
— 838-970 not yet reported which blocks → NY
— 838-976 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 839-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX SC
— 839-214 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ROCK HILL SC
— 839-225 0XXX1XXX2XXX3XXX4XXX5XXX · 2 holders which blocks → ONVOY, LLC - SC 548E NORTH SC
— 839-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX SC
— 839-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX SC
— 839-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX SC
— 839-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST SC

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.