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
— 917-953 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 NWYRCYZN01 NY
— 917-954 not yet reported which blocks → SPOK, INC. 6630 NWYRCYZN01 NY
— 917-956 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 NWYRCYZN01 NY
— 917-957 not yet reported which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN01 NY
— 917-958 not yet reported which blocks → NY
— 917-959 not yet reported which blocks → NY
— 917-961 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 917-964 not yet reported which blocks → SPOK, INC. 6630 NWYRCYZN06 NY
— 917-965 2XXX3XXX4XXX5XXX8XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 917-968 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN07 NY
— 917-969 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
— 917-971 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN06 NY
— 917-972 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN10 NY
— 917-974 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN06 NY
— 917-975 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN06 NY
— 917-976 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 917-977 0XXX1XXX2XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 917-978 not yet reported which blocks → SPOK, INC. 6630 NWYRCYZN01 NY
— 917-980 not yet reported which blocks → SPOK, INC. 6630 NWYRCYZN06 NY
— 917-981 0XXX1XXX4XXX5XXX7XXX8XXX9XXX which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 917-988 not yet reported which blocks → SPOK, INC. 6630 NWYRCYZN06 NY
— 917-989 not yet reported which blocks → SPOK, INC. 6630 NWYRCYZN06 NY
— 917-990 not yet reported which blocks → SPOK, INC. 6630 NWYRCYZN06 NY
— 917-991 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
— 917-992 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
— 917-995 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 917-996 not yet reported which blocks → SPOK, INC. 6630 NWYRCYZN01 NY
— 917-999 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC- NY 384C NWYRCYZN01 NY
— 918-200 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA OK - LLC 530C TULSA OK
— 918-201 0–9 XXXall 10 · 4 holders which blocks → CSC VOICE, LLC 612K WAGONER OK
— 918-202 3XXX4XXX5XXX6XXX8XXX9XXX which blocks → ONVOY, LLC - OK 409F CATOOSA OK
— 918-203 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 FORTGIBSON OK
— 918-204 1XXX2XXX3XXX4XXX8XXX9XXX which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-205 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OK 409F COLLINSVL OK
— 918-207 2XXX5XXX6XXX7XXX8XXX9XXX which blocks → SOUTHWESTERN BELL 9533 TAHLEQUAH OK
— 918-208 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SALLISAW OK
— 918-209 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F JENKS OK
— 918-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OK
— 918-212 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OK 409F OWASSO OK
— 918-213 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 BARTLESVL OK
— 918-215 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OK 409F SAND SPG OK
— 918-216 0XXX1XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OK 409F SAPULPA OK
— 918-217 2XXX4XXX8XXX · 3 holders which blocks → ONVOY, LLC - OK 409F SKIATOOK OK
— 918-218 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - OK 409F SPERRY OK
— 918-219 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 AFTON OK
— 918-220 not yet reported which blocks → SPOK, INC. 6630 MCALESTER OK
— 918-221 0–9 XXXall 10 · 3 holders which blocks → NORTHEAST RURAL SERVICES, INC. - OK 945H TULSA OK
— 918-223 1XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 CUSHING OK
— 918-224 not yet reported which blocks → SOUTHWESTERN BELL 9533 SAPULPA OK
— 918-225 not yet reported which blocks → SOUTHWESTERN BELL 9533 CUSHING OK

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.