NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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. 39
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 15
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
2004-10-05 850-394 0–9 XXXall 10 · 7 holders which blocks → SOUTHERN COMMUNICATIONS SERVICES, INC. 6744 MARIANNA FL
2004-10-04 386-209 6XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 LIVE OAK FL
2004-10-04 407-232 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 ORLANDO FL
2004-10-04 410-900 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J BALTIMORE MD
2004-10-04 443-282 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 CHESTERTN MD
2004-10-04 503-336 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J BEAVERTON OR
2004-10-04 540-209 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA 7238 HARRISONBG VA
2004-10-04 765-822 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DELPHI IN
2004-10-04 786-228 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 MIAMI FL
2004-10-04 787-673 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 SAN GERMAN PR
2004-10-04 817-201 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
2004-10-04 817-372 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
2004-10-04 817-733 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
2004-10-04 817-995 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
2004-10-04 903-219 3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 CLARKSVL TX
2004-10-01 412-301 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J PTTSBGZON2 PA
2004-10-01 412-458 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J PTTSBGZON7 PA
2004-10-01 412-668 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J PTTSBGZON6 PA
2004-10-01 605-990 not yet reported which blocks → ATV HOLDINGS, LLC D/B/A MITCHELL TELECOM - SD 682C MITCHELL SD
2004-10-01 647-212 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2004-10-01 740-936 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SUNBURY OH
2004-10-01 780-203 not yet reported which blocks → TELUS Mobility 8301 Edmonton —
2004-10-01 807-276 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Fort Frances —
2004-10-01 905-622 not yet reported which blocks → TELUS Mobility 8303 Ajax-Pickering —
2004-10-01 912-320 0–9 XXXall 10 · 5 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 HINESVILLE GA
2004-09-30 403-471 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Calgary —
2004-09-30 570-832 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 MILFORD PA
2004-09-30 662-857 2XXX3XXX5XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MS 4886 SARDIS MS
2004-09-30 678-608 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2004-09-30 678-894 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA NE GA
2004-09-30 678-909 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA NW GA
2004-09-30 915-642 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CANUTILLO TX
2004-09-30 956-903 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MERCEDES TX
2004-09-30 972-973 0–9 XXXwhole prefix which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 DLFTWTARPT TX
2004-09-29 269-475 0–9 XXXall 10 · 9 holders which blocks → ACD TELECOM, INC. - MI 3535 VICKSBURG MI
2004-09-29 269-682 0–9 XXXall 10 · 7 holders which blocks → ACD TELECOM, INC. - MI 3535 HOPKINS MI
2004-09-29 269-742 4XXX6XXX7XXX · 3 holders which blocks → ACD TELECOM, INC. - MI 3535 ATHENS MI
2004-09-29 269-913 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ACD TELECOM, INC. - MI 3535 PAW PAW MI
2004-09-29 276-206 0–9 XXXall 10 · 5 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 ABINGDON VA
2004-09-29 347-677 0–9 XXXall 10 · 3 holders which blocks → XCHANGE TELECOM CORP. - NY 325B NWYRCYZN06 NY
2004-09-29 404-424 0–9 XXXall 10 · 4 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2004-09-29 423-557 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 JOHNSON CY TN
2004-09-29 567-623 0–9 XXXall 10 · 8 holders which blocks → ONVOY, LLC - OH 464C HURON OH
2004-09-29 567-952 0XXX2XXX7XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K WATERVILLE OH
2004-09-29 616-384 0–9 XXXall 10 · 7 holders which blocks → ACD TELECOM, INC. - MI 3535 COOPERSVL MI
2004-09-29 616-537 0–9 XXXall 10 · 8 holders which blocks → ACD TELECOM, INC. - MI 3535 LAKEODESSA MI
2004-09-29 616-841 0–9 XXXall 10 · 9 holders which blocks → ACD TELECOM, INC. - MI 3535 IONIA MI
2004-09-29 646-453 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J NWYRCYZN01 NY
2004-09-29 708-213 0–9 XXXall 10 · 4 holders which blocks → ILLINOIS BELL TEL CO 9329 HOMEWOOD IL
2004-09-29 815-213 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → UNITED STATES CELLULAR - IL 6265 STERLING IL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.