NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 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, all time — NPA 870
SOUTHWESTERN BELL 154
NEW CINGULAR WIRELESS PCS, LLC - IL 105
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 85
WINDSTREAM ARKANSAS, INC. 72
LEVEL 3 COMMUNICATIONS, LLC - AR 47
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
2020-11-27 870-876 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - AR 348F JESUP AR
2020-10-15 870-790 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 JONESBORO AR
2020-10-12 870-641 0–9 XXXall 10 · 6 holders which blocks → HD CARRIER LLC 321J JONESBORO AR
2020-09-21 870-618 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EL DORADO AR
2020-07-10 870-789 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EL DORADO AR
2020-07-02 870-719 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 HARRISON AR
2020-05-06 870-649 0XXX2XXX · 2 holders which blocks → E. RITTER COMMS DBA RITTER COMMUNICATIONS, INC. AR 095A STUTTGART AR
2020-01-24 870-646 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 IMBODEN AR
2020-01-14 870-604 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JONESBORO AR
2019-11-04 870-771 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARION AR
2019-10-10 870-860 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AR 348F HARDY AR
2019-09-06 870-621 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 TEXARKANA AR
2019-05-07 870-721 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 WASHINGTON AR
2019-04-12 870-716 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 HARRISON AR
2019-04-09 870-713 0–9 XXXall 10 · 2 holders which blocks → CSC WIRELESS, LLC 425J EL DORADO AR
2019-02-08 870-709 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - AR 196F GURDON AR
2019-01-28 870-705 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C ASH FLAT AR
2019-01-18 870-666 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H JONESBORO AR
2018-12-19 870-601 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C MONETTE AR
2018-10-25 870-521 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWARK AR
2018-10-18 870-517 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 HARRISON AR
2018-09-27 870-686 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - AR 196F BODCAW AR
2018-09-21 870-800 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AR 348F ROSSTON AR
2018-08-10 870-497 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 JONESBORO AR
2018-05-29 870-433 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - AR 196F CHEROKEVLG AR
2018-04-25 870-399 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - AR 196F BLEVINS AR
2018-04-23 870-396 0XXX2XXX5XXX6XXX7XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 DELAPLAINE AR
2018-02-28 870-383 0XXX1XXX2XXX3XXX8XXX9XXX · 5 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 ELAINE AR
2018-02-28 870-393 0–9 XXXall 10 · 6 holders which blocks → AIRUS, INC. - AR 578H JONESBORO AR
2018-02-14 870-380 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → E. RITTER COMMUNICATIONS, LLC 128L PINE BLUFF AR
2018-02-01 870-369 9XXX which blocks → WINDSTREAM ARKANSAS, INC. 1691 WILMOT AR
2017-10-19 870-359 0–9 XXXall 10 · 5 holders which blocks → RED RIVER CELLULAR TELEPHONE CORPORATION - AR 095J HOPE AR
2017-10-19 870-361 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → RED RIVER CELLULAR TELEPHONE CORPORATION - AR 095J TEXARKANA AR
2017-10-18 870-888 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AR 348F ASHDOWN AR
2017-09-06 870-242 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 DAISY AR
2017-09-06 870-290 0XXX1XXX2XXX3XXX4XXX6XXX7XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 DELIGHT AR
2017-09-06 870-306 0XXX1XXX2XXX3XXX4XXX6XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 OKOLONA AR
2017-09-06 870-337 0XXX2XXX3XXX4XXX7XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 NORMAN AR
2017-08-01 870-205 0–9 XXXall 10 · 5 holders which blocks → E. RITTER COMMUNICATIONS, LLC 128L PARAGOULD AR
2017-01-19 870-938 0–9 XXXall 10 · 5 holders which blocks → E. RITTER COMMUNICATIONS, LLC 128L JONESBORO AR
2016-12-22 870-999 0XXX9XXX · 2 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 CROSSETT AR
2016-11-23 870-900 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 VIOLA AR
2016-11-01 870-907 0XXX1XXX2XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 MAMMOTHSPG AR
2016-11-01 870-971 0XXX1XXX2XXX3XXX7XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 SALEM AR
2016-07-27 870-912 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C NASHVILLE AR
2016-07-13 870-804 8XXX9XXX · 2 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 TUCKERMAN AR
2016-06-13 870-913 3XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SWIFTON AR
2016-05-05 870-360 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 PINE BLUFF AR
2016-01-13 870-970 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C FORREST CY AR
2015-10-28 870-987 0XXX1XXX7XXX · 3 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J MALLARD PT AR

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.