NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Quick find in this area code:
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 501-905 not yet reported which blocks → WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
— 501-906 not yet reported which blocks → WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
— 501-907 not yet reported which blocks → WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
— 501-908 none assigned yet which blocks → METROPCS, INC. 5562 CONWAY AR
— 501-909 2XXX8XXX which blocks → METROPCS, INC. 5562 BENTON AR
— 501-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AR
— 501-912 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 LITTLEROCK AR
— 501-913 8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 LITTLEROCK AR
— 501-914 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 LITTLEROCK AR
— 501-915 1XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 JESSIEVL AR
— 501-916 0XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-918 0XXX8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-920 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
— 501-922 not yet reported which blocks → SOUTHWESTERN BELL 9533 JESSIEVL AR
— 501-932 1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → WINDSTREAM COMMUNICATIONS, INC. - AR 7656 CONWAY AR
— 501-939 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → SOUTHWESTERN BELL 9533 LONSDALE AR
— 501-940 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
— 501-941 none assigned yet which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 CABOT AR
— 501-943 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → WINDSTREAM COMMUNICATIONS, INC. - AR 7656 BRYANTCGVL AR
— 501-944 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
— 501-945 not yet reported which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-950 not yet reported which blocks → AR
— 501-951 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 LITTLEROCK AR
— 501-952 none assigned yet which blocks → METROPCS, INC. 5562 LITTLEROCK AR
— 501-953 not yet reported which blocks → SOUTHWESTERN BELL 9533 XXXXXXXXXX AR
— 501-954 0XXX6XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-955 not yet reported which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-956 not yet reported which blocks → SOUTHWESTERN BELL 9533 XXXXXXXXXX AR
— 501-958 not yet reported which blocks → LITTLEROCK AR
— 501-959 not yet reported which blocks → LITTLEROCK AR
— 501-960 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LITTLEROCK AR
— 501-961 0XXX2XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 SCOTT AR
— 501-971 not yet reported which blocks → SOUTHWESTERN BELL 9533 XXXXXXXXXX AR
— 501-975 not yet reported which blocks → WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
— 501-976 not yet reported which blocks → AR
— 501-977 none assigned yet which blocks → SOUTHWESTERN BELL 9533 MORRILTON AR
— 501-978 not yet reported which blocks → WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
— 501-980 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AR
— 501-982 not yet reported which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 JACKSONVL AR
— 501-983 2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 JACKSONVL AR
— 501-984 0XXX7XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 JESSIEVL AR
— 501-985 not yet reported which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 JACKSONVL AR
— 501-987 not yet reported which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 JACKSONVL AR
— 501-988 3XXX6XXX7XXX · 2 holders which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 JACKSONVL AR
— 501-989 not yet reported which blocks → SOUTHWESTERN BELL 9533 XXXXXXXXXX AR
— 501-990 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AR
— 501-991 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 CRYSTALSPG AR
— 501-992 6XXX7XXX8XXX9XXX · 2 holders which blocks → WINDSTREAM COMMUNICATIONS, INC. - AR 7656 SYVNHLSHWD AR
— 501-993 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 LITTLEROCK AR
— 502-204 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 XXXXXXXXXX KY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.