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
2014-01-29 214-308 0–9 XXXall 10 · 6 holders which blocks → CSC VOICE, LLC 612K FRISCO TX
2014-01-29 226-561 not yet reported which blocks → Quadro Communications Co-operative Inc. 004G Thorndale —
2014-01-29 432-606 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → CSC VOICE, LLC 612K BIG SPRING TX
2014-01-29 432-701 0–9 XXXall 10 · 5 holders which blocks → CSC VOICE, LLC 612K TERMINAL TX
2014-01-29 469-614 0–9 XXXall 10 · 8 holders which blocks → CSC VOICE, LLC 612K TERRELL TX
2014-01-29 469-707 0–9 XXXall 10 · 6 holders which blocks → CSC VOICE, LLC 612K ROYSE CITY TX
2014-01-29 469-720 0–9 XXXall 10 · 3 holders which blocks → CSC VOICE, LLC 612K FORNEY TX
2014-01-29 581-650 not yet reported which blocks → Videotron Ltd. 8306 St-Honore (Temiscouata Co.) —
2014-01-29 709-978 not yet reported which blocks → TELUS Integrated Communications 2782 Carbonear —
2014-01-29 709-979 not yet reported which blocks → TELUS Integrated Communications 2782 Clarenville —
2014-01-29 709-980 not yet reported which blocks → TELUS Integrated Communications 2782 Freshwater —
2014-01-29 709-981 not yet reported which blocks → TELUS Integrated Communications 2782 Marystown —
2014-01-29 903-919 0–9 XXXall 10 · 6 holders which blocks → CSC VOICE, LLC 612K SULPHURSPG TX
2014-01-28 214-301 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 WAXAHACHIE TX
2014-01-28 224-774 0XXX1XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 ZION IL
2014-01-28 317-772 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
2014-01-28 571-304 0–9 XXXwhole prefix which blocks → VERIZON VIRGINIA, INC. 9213 HERNDON VA
2014-01-28 681-291 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → CSC VOICE, LLC 612K RAINELLE WV
2014-01-28 681-318 0–9 XXXall 10 · 7 holders which blocks → CSC VOICE, LLC 612K LEWISBURG WV
2014-01-28 681-400 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → CSC VOICE, LLC 612K WHITESVL WV
2014-01-28 681-422 0–9 XXXall 10 · 4 holders which blocks → CSC VOICE, LLC 612K MOUNT HOPE WV
2014-01-28 681-539 0XXX1XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → CSC VOICE, LLC 612K SOPHIA WV
2014-01-28 681-612 0–9 XXXall 10 · 8 holders which blocks → CSC VOICE, LLC 612K ST MARYS WV
2014-01-28 681-731 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → CSC VOICE, LLC 612K MILL CREEK WV
2014-01-28 717-988 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HARISBGZN1 PA
2014-01-28 762-212 0–9 XXXall 10 · 7 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 WAYNESBORO GA
2014-01-28 765-400 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ANDERSON IN
2014-01-28 878-332 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 WEXFORD PA
2014-01-27 224-707 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E HIGHLANDPK IL
2014-01-27 323-621 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 MONTEBELLO CA
2014-01-27 360-890 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 OLYMPIA WA
2014-01-27 469-706 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 IRVING TX
2014-01-27 470-250 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E TEMPLE GA
2014-01-27 541-919 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J ATHENA OR
2014-01-27 636-515 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OFALLON MO
2014-01-27 681-233 0–9 XXXall 10 · 5 holders which blocks → CSC VOICE, LLC 612K HURRICANE WV
2014-01-27 681-459 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CSC VOICE, LLC 612K GLENDANIEL WV
2014-01-27 681-735 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CSC VOICE, LLC 612K KERMIT WV
2014-01-27 971-315 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 AUMSVLTRNR OR
2014-01-27 971-316 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J GRAND IS OR
2014-01-27 971-318 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J AMITY OR
2014-01-24 267-260 0–9 XXXwhole prefix which blocks → PAETEC ITEL, LLC 829J PHLDLPHZN1 PA
2014-01-24 336-390 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E TIMBERLAKE NC
2014-01-24 343-225 not yet reported which blocks → TELUS Integrated Communications 2782 Brockville —
2014-01-24 417-757 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J BRANSON MO
2014-01-24 437-345 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2014-01-24 438-345 not yet reported which blocks → TELUS Mobility 8303 Montreal —
2014-01-24 587-299 not yet reported which blocks → TELUS 8084 Grande Prairie —
2014-01-24 619-430 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG SNDG CA
2014-01-24 657-233 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C GARDEN GRV CA

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.