NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

337 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 25
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 12
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
2013-04-24 779-226 not yet reported which blocks → COMCAST IP PHONE, LLC 318J POLO IL
2013-04-24 786-448 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2013-04-24 786-451 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2013-04-24 857-269 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F ROXBURY MA
2013-04-24 951-376 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ARLINGTON CA
2013-04-24 971-274 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J GRESHAM OR
2013-04-23 205-582 0–9 XXXall 10 · 5 holders which blocks → TELEPAK NETWORKS, INC. - AL 947G BIRMINGHAM AL
2013-04-23 224-326 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J NORTHBROOK IL
2013-04-23 234-246 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J RICHFIELD OH
2013-04-23 249-988 not yet reported which blocks → Fido Solutions Inc. 8820 Parry Sound —
2013-04-23 302-273 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J NEWARK DE
2013-04-23 541-699 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 REDMOND OR
2013-04-23 567-348 0–9 XXXwhole prefix which blocks → ONVOY, LLC - OH 464C BOWLNGGREN OH
2013-04-23 580-500 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 CLINTON OK
2013-04-23 848-232 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J PTPLEASANT NJ
2013-04-23 857-273 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J JAMAICA PL MA
2013-04-22 234-803 0–9 XXXall 10 · 7 holders which blocks → SIGECOM, LLC DBA WOW INTERNET CABLE AND PHONE 735E BRUNSWICK OH
2013-04-22 254-294 0–9 XXXall 10 · 4 holders which blocks → AMA COMM., LLC DBA AMA*TECHTEL COMMUNICATIONS-TX 0132 WACO TX
2013-04-22 469-803 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FRISCO TX
2013-04-22 705-914 not yet reported which blocks → Bell Mobility 6574 Wawa —
2013-04-22 786-916 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J NORTH DADE FL
2013-04-22 807-323 not yet reported which blocks → Bell Mobility 6574 Dryden —
2013-04-22 807-324 not yet reported which blocks → Bell Mobility 6574 Atikokan —
2013-04-22 807-863 not yet reported which blocks → Bell Mobility 6574 Geraldton —
2013-04-21 248-308 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 NORTHVILLE MI
2013-04-19 226-939 not yet reported which blocks → Fido Solutions Inc. 8820 Goderich —
2013-04-19 226-990 not yet reported which blocks → Fido Solutions Inc. 8820 Walkerton —
2013-04-19 226-992 not yet reported which blocks → Fido Solutions Inc. 8820 Port Elgin —
2013-04-19 226-995 not yet reported which blocks → Fido Solutions Inc. 8820 Wingham —
2013-04-19 236-237 not yet reported which blocks → Iristel Inc. 154E Victoria —
2013-04-19 249-991 not yet reported which blocks → Fido Solutions Inc. 8820 New Liskeard —
2013-04-19 249-992 not yet reported which blocks → Fido Solutions Inc. 8820 Kirkland Lake —
2013-04-19 249-993 not yet reported which blocks → Fido Solutions Inc. 8820 West Guilford —
2013-04-19 249-994 not yet reported which blocks → Fido Solutions Inc. 8820 Kapuskasing —
2013-04-19 249-995 not yet reported which blocks → Fido Solutions Inc. 8820 Huntsville —
2013-04-19 249-998 not yet reported which blocks → Fido Solutions Inc. 8820 Fenelon Falls —
2013-04-19 267-301 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 PHLDLPHZN1 PA
2013-04-19 267-314 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN1 PA
2013-04-19 314-203 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-04-19 314-585 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2013-04-19 317-668 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FRANKLIN IN
2013-04-19 317-720 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FAIRLAND IN
2013-04-19 317-970 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
2013-04-19 517-253 0–9 XXXall 10 · 4 holders which blocks → MICHIGAN BELL TEL CO 9323 LANSING MI
2013-04-19 520-499 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 TUCSON AZ
2013-04-19 570-703 0–9 XXXall 10 · 4 holders which blocks → CTSI, INC. - PA 7513 SCRANTON PA
2013-04-19 581-372 not yet reported which blocks → Bell Mobility 6574 Saint-Georges-de-Beauce —
2013-04-19 587-432 not yet reported which blocks → Bell Mobility 6574 Calgary —
2013-04-19 587-748 not yet reported which blocks → Distributel 081E Peace River —
2013-04-19 587-749 not yet reported which blocks → Distributel 081E Slave Lake —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.