NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2010-03-16 443-464 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J CHURCHVL MD
2010-03-16 575-777 9XXX which blocks → T-MOBILE USA, INC. 6529 CLOVIS NM
2010-03-16 762-236 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C TENNGA GA
2010-03-16 850-614 0–9 XXXall 10 · 7 holders which blocks → MCC TELEPHONY OF FLORIDA, LLC - FL 919F BONIFAY FL
2010-03-16 850-660 0–9 XXXall 10 · 4 holders which blocks → MCC TELEPHONY LLC 593K SANROSABCH FL
2010-03-16 850-684 0–9 XXXall 10 · 4 holders which blocks → MCC TELEPHONY LLC 593K HOLLEYNVRR FL
2010-03-15 270-801 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K RADCLIFF KY
2010-03-15 270-941 0XXX1XXX8XXX9XXX · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K NO GARRETT KY
2010-03-15 386-279 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 DELAND FL
2010-03-15 480-745 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2010-03-15 507-519 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → MCC TELEPHONY OF MINNESOTA, LLC - MN 719F ST PETER MN
2010-03-15 530-719 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 PLVL SOUTH CA
2010-03-15 613-644 not yet reported which blocks → Bragg Communications Inc. 4878 Marmora —
2010-03-15 613-645 not yet reported which blocks → Bragg Communications Inc. 4878 Picton —
2010-03-15 775-413 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NV 587C CRYSTALBAY NV
2010-03-15 860-717 0–9 XXXall 10 · 8 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 NEWMILFORD CT
2010-03-15 912-321 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 HINESVILLE GA
2010-03-15 915-255 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EL PASO TX
2010-03-15 928-259 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 YUMA AZ
2010-03-15 952-923 0–9 XXXall 10 · 2 holders which blocks → MCC TELEPHONY LLC 593K TWINCITIES MN
2010-03-13 254-777 0–9 XXXall 10 · 4 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D WACO TX
2010-03-12 202-524 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J WSHNGTNZN1 DC
2010-03-12 289-986 not yet reported which blocks → TELUS Integrated Communications 2782 South Pickering —
2010-03-12 289-989 not yet reported which blocks → TELUS Integrated Communications 2782 Whitby —
2010-03-12 304-900 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - WV 489F FAYETTEVL WV
2010-03-12 418-579 not yet reported which blocks → Distributel 083E Chicoutimi —
2010-03-12 424-254 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 REDONDO CA
2010-03-12 450-339 not yet reported which blocks → Videotron Ltd. 8306 Beloeil —
2010-03-12 450-356 not yet reported which blocks → Videotron Ltd. 8306 Boucherville —
2010-03-12 450-695 not yet reported which blocks → Videotron Ltd. 8306 Laprairie —
2010-03-12 450-875 not yet reported which blocks → Distributel 083E Joliette —
2010-03-12 450-890 not yet reported which blocks → Videotron Ltd. 8306 St-Lambert —
2010-03-12 470-201 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 GAINESVL GA
2010-03-12 480-269 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2010-03-12 480-382 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2010-03-12 480-788 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2010-03-12 559-544 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 PORTERVL CA
2010-03-12 619-799 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2010-03-12 661-385 0XXX1XXX2XXX6XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 EDWARDS CA
2010-03-12 757-603 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WILLIAMSBG VA
2010-03-12 762-821 0–9 XXXall 10 · 6 holders which blocks → MCC TELEPHONY LLC 593K COLUMBUS GA
2010-03-12 806-427 not yet reported which blocks → AMA COMM., LLC DBA AMA*TECHTEL COMMUNICATIONS-TX 0132 WILDORADO TX
2010-03-12 850-669 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → MCC TELEPHONY LLC 593K CRESTVIEW FL
2010-03-11 202-603 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC 6402 WSHNGTNZN1 DC
2010-03-11 202-688 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - DC 6117 WSHNGTNZN1 DC
2010-03-11 226-671 not yet reported which blocks → Managed Network Systems Inc. 2776 Chatham —
2010-03-11 226-672 not yet reported which blocks → Managed Network Systems Inc. 2776 Sarnia —
2010-03-11 229-537 1XXX2XXX3XXX4XXX7XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 SHELLMAN GA
2010-03-11 315-417 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J ILION NY
2010-03-11 319-820 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 MONTICELLO IA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.