NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

3 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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 — NPA 219
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 1
ONVOY, LLC - IN 1
NEW CINGULAR WIRELESS PCS, LLC - IL 1
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
2002-04-10 219-558 0–9 XXXall 10 · 7 holders which blocks → INDIANA BELL TEL CO INC 9325 ST JOHN IN
2002-03-14 219-509 2XXX3XXX5XXX6XXX7XXX · 5 holders which blocks → FBN INDIANA, INC. - IN 4117 HEBRON IN
2002-03-14 219-588 4XXX5XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 GARY IN
2002-02-27 219-381 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MERRILLVL IN
2002-02-11 219-506 2XXX3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → FBN INDIANA, INC. - IN 4117 MOROCCO IN
2002-02-11 219-801 2XXX3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 E CHICAGO IN
2002-01-28 219-230 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FIRST COMMUNICATIONS, LLC 460K HAMMOND IN
2002-01-10 219-951 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 GARY IN
2001-12-10 219-810 2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → FBN INDIANA, INC. - IN 4117 GARY IN
2001-11-08 219-803 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 HAMMOND IN
2001-10-09 219-310 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 CROWNPOINT IN
2001-05-31 219-308 2XXX7XXX which blocks → T-MOBILE USA, INC. 6529 CROWNPOINT IN
2001-05-31 219-309 0XXX2XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 VALPARAISO IN
2001-05-04 219-448 2XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 WESTVILLE IN
2001-03-06 219-808 none assigned yet which blocks → T-MOBILE USA, INC. 6529 GARY IN
2001-01-31 219-805 not yet reported which blocks → T-MOBILE USA, INC. 6529 GARY IN
2001-01-31 219-902 none assigned yet which blocks → T-MOBILE USA, INC. 6529 GARY IN
2001-01-04 219-218 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HAMMOND IN
— 219-201 none assigned yet which blocks → T-MOBILE USA, INC. 6529 GARY IN
— 219-205 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SAN PIERRE IN
— 219-206 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F RENSSELAER IN
— 219-209 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F MOROCCO IN
— 219-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IN
— 219-222 not yet reported which blocks → INDIANA PAGING NETWORK, INC. 6795 MERRILLVL IN
— 219-226 3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → INDIANA BELL TEL CO INC 9325 CROWNPOINT IN
— 219-232 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 CEDAR LAKE IN
— 219-238 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 GARY IN
— 219-241 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 VALPARAISO IN
— 219-242 6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 VALPARAISO IN
— 219-249 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H MICHIGANCY IN
— 219-251 0XXX2XXX4XXX7XXX · 4 holders which blocks → MCC TELEPHONY LLC 593K ROSELAWN IN
— 219-253 not yet reported which blocks → MONON TEL. CO., INC. 0790 MONON IN
— 219-254 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 PORTAGE IN
— 219-258 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D LA PORTE IN
— 219-261 1XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 REMINGTON IN
— 219-275 7XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 BROOK IN
— 219-279 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 WOLCOTT IN
— 219-285 1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → INDIANA BELL TEL CO INC 9325 MOROCCO IN
— 219-297 1XXX7XXX which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 GOODLAND IN
— 219-305 2XXX5XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J LKSFRSSONS IN
— 219-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IN
— 219-314 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 GARY IN
— 219-322 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 DYER IN
— 219-324 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LA PORTE IN
— 219-325 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LA PORTE IN
— 219-326 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LA PORTE IN
— 219-331 0XXX2XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 PORTAGE IN
— 219-345 not yet reported which blocks → NORTHWESTERN INDIANA TEL. CO., INC. 0800 ROSELAWN IN
— 219-362 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LA PORTE IN
— 219-363 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 LA PORTE IN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.