NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2016-02-10 506-708 not yet reported which blocks → Iristel Inc. 154E Petitcodiac —
2016-02-10 579-639 not yet reported which blocks → Videotron Ltd. 8306 Mascouche —
2016-02-10 586-377 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WARREN MI
2016-02-10 586-449 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WARREN MI
2016-02-10 587-493 not yet reported which blocks → TELUS 8084 Cochrane —
2016-02-10 587-872 not yet reported which blocks → Iristel Inc. 154E Olds —
2016-02-10 587-874 not yet reported which blocks → Iristel Inc. 154E Oyen —
2016-02-10 657-299 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2016-02-10 657-301 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2016-02-10 747-204 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - CA 649C CANOGAPARK CA
2016-02-10 765-731 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → BLOOMINGDALE HOME TELEPHONE COMPANY, INC. - IN 731H ROCKVILLE IN
2016-02-10 778-716 not yet reported which blocks → Iristel Inc. 154E Parksville —
2016-02-10 782-824 not yet reported which blocks → Iristel Inc. 154E Musquodoboit Harbour —
2016-02-10 803-373 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - SC 548E BATH SC
2016-02-10 857-477 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - MA 892D JAMAICA PL MA
2016-02-10 928-236 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AZ 630E SOMERTON AZ
2016-02-10 949-301 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SADLBK VLY CA
2016-02-09 249-491 not yet reported which blocks → Iristel Inc. 154E Markstay —
2016-02-09 249-492 not yet reported which blocks → Iristel Inc. 154E Midland —
2016-02-09 343-340 not yet reported which blocks → Iristel Inc. 154E Merrickville —
2016-02-09 425-553 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J KIRKLAND WA
2016-02-09 509-417 0XXX2XXX4XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 WARDEN WA
2016-02-09 515-805 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DES MOINES IA
2016-02-09 631-202 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC- NY 384C RONKONKOMA NY
2016-02-09 631-977 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC- NY 384C PATCHOGUE NY
2016-02-09 639-392 not yet reported which blocks → Iristel Inc. 154E Lumsden —
2016-02-09 709-909 not yet reported which blocks → Iristel Inc. 154E Marystown —
2016-02-09 717-696 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - PA 547E LANCASTER PA
2016-02-09 778-717 not yet reported which blocks → Iristel Inc. 154E Merritt —
2016-02-09 782-822 not yet reported which blocks → Iristel Inc. 154E Middleton —
2016-02-09 782-823 not yet reported which blocks → Iristel Inc. 154E Montague —
2016-02-09 807-787 not yet reported which blocks → Iristel Inc. 154E Marathon —
2016-02-09 873-734 not yet reported which blocks → Iristel Inc. 154E Maniwaki —
2016-02-09 909-757 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C ONTARIO CA
2016-02-08 226-286 not yet reported which blocks → Iristel Inc. 154E Leamington —
2016-02-08 226-640 not yet reported which blocks → Iristel Inc. 154E Listowel —
2016-02-08 251-250 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E BAYMINETTE AL
2016-02-08 317-342 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D ZIONSVILLE IN
2016-02-08 475-245 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2016-02-08 571-459 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN19 VA
2016-02-08 579-791 not yet reported which blocks → Iristel Inc. 154E Lachute —
2016-02-08 579-792 not yet reported which blocks → Iristel Inc. 154E Lanoraie —
2016-02-08 587-871 not yet reported which blocks → Iristel Inc. 154E Langdon —
2016-02-08 612-426 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MN 5256 TWINCITIES MN
2016-02-08 631-201 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC- NY 384C AMITYVILLE NY
2016-02-08 639-391 not yet reported which blocks → Iristel Inc. 154E Langham —
2016-02-08 778-784 not yet reported which blocks → Iristel Inc. 154E Lillooet —
2016-02-08 782-414 not yet reported which blocks → Bragg Communications Inc. 421G Halifax —
2016-02-08 782-821 not yet reported which blocks → Iristel Inc. 154E Liverpool —
2016-02-08 818-214 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C RESEDA CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.