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
2013-10-25 320-407 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MN 184D ST CLOUD MN
2013-10-25 434-254 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J BLACKSTONE VA
2013-10-25 512-596 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2013-10-25 587-805 not yet reported which blocks → Iristel Inc. 154E St. Albert —
2013-10-25 619-831 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SNDG SNDG CA
2013-10-25 639-888 not yet reported which blocks → TELUS Integrated Communications 2782 Regina —
2013-10-25 709-400 not yet reported which blocks → Iristel Inc. 154E Torbay —
2013-10-25 720-451 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2013-10-25 806-704 none assigned yet which blocks → CEBRIDGE TELECOM TX , L.P. - TX 318C WOODROW TX
2013-10-25 832-996 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J SATSUMA TX
2013-10-25 915-703 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 CLINT TX
2013-10-25 915-803 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 EL PASO TX
2013-10-25 940-703 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DENTON TX
2013-10-25 956-701 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAREDO TX
2013-10-24 217-777 not yet reported which blocks → COMPUTER TECHNIQUES, INC. - IL 197H TAYLORVL IL
2013-10-24 253-371 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TACOMA WA
2013-10-24 313-246 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN5 MI
2013-10-24 313-545 0–9 XXXwhole prefix which blocks → MICHIGAN BELL TEL CO 9323 DETROITZN1 MI
2013-10-24 331-703 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 W CHICAGO IL
2013-10-24 480-842 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2013-10-24 502-202 0–9 XXXwhole prefix which blocks → POWERTEL KENTUCKY LICENSES, INC. 365C LOUISVILLE KY
2013-10-24 502-302 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 LOUISVILLE KY
2013-10-24 520-912 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2013-10-24 571-279 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2013-10-24 602-529 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2013-10-24 623-800 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2013-10-24 682-703 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J FORT WORTH TX
2013-10-24 708-998 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2013-10-24 774-701 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 WORCESTER MA
2013-10-24 806-701 0–9 XXXall 10 · 3 holders which blocks → CEBRIDGE TELECOM TX , L.P. - TX 318C LUBBOCK TX
2013-10-24 806-803 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX which blocks → CSC VOICE, LLC 612K AMARILLO TX
2013-10-24 832-844 0–9 XXXall 10 · 3 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D HOUSTON TX
2013-10-24 909-487 0–9 XXXall 10 · 6 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CRESTLINE CA
2013-10-24 925-278 0–9 XXXall 10 · 7 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L WALNUT CRK CA
2013-10-23 206-946 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - WA 483E SEATTLE WA
2013-10-23 331-702 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 NAPERVILLE IL
2013-10-23 360-984 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VANCOUVER WA
2013-10-23 409-999 0–9 XXXall 10 · 5 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D PORTARTHUR TX
2013-10-23 502-203 0–9 XXXall 10 · 3 holders which blocks → POWERTEL KENTUCKY LICENSES, INC. 365C BARDSTOWN KY
2013-10-23 681-265 0–9 XXXwhole prefix which blocks → CSC VOICE, LLC 612K CHRLSTNZN1 WV
2013-10-23 681-282 0XXX1XXX5XXX · 2 holders which blocks → CSC VOICE, LLC 612K PRINCETON WV
2013-10-23 720-630 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DENVER CO
2013-10-23 737-210 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C AUSTIN TX
2013-10-22 206-348 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2013-10-22 306-250 not yet reported which blocks → SaskTel Mobility 9868 Saskatoon —
2013-10-22 306-519 not yet reported which blocks → SaskTel Mobility 9868 Regina —
2013-10-22 312-721 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2013-10-22 312-978 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2013-10-22 314-755 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2013-10-22 509-792 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PASCO WA

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.