IP RDNS
The reverse DNS name of every IPv4 and IPv6 address that answers a PTR query.
| ID | ip_rdns_v1 |
|---|---|
| Formats | csvgz |
| Update Frequency | Weekly |
| Last Updated | November 7th 2026 (yesterday) |
| Entries | 1,228,795,345 |
File Size (csvgz) | 8.88 GB |
Overview
One row per address that answers a PTR query, with the host name it returns, from our own scans of the IPv4 address space and of known IPv6 hosts. It is rebuilt weekly.
IPv6 addresses are written in their compressed form, as in every other database here. Rows are in no particular order, so sort on load if you need address order. A name holding a comma, quote, backslash or whitespace, which no valid host name does, is left out.
Formats
curl -L -o ip_rdns_v1.csv.gz -X GET "https://internetdata.io/api/v2/database/download?id=ip_rdns_v1&format=csvgz&apikey=$APIKEY"Schema
| Name | Type | Description |
|---|---|---|
ip | ipaddress | The IP address, IPv4 or IPv6. |
domain | string | The host name its reverse DNS (PTR) record points to. |
Samples
| ip | domain |
|---|---|
81.119.220.104 | host-81-119-220-104.business.telecomitalia.it |
37.24.179.63 | ip-037-024-179-063.um08.pools.vodafone-ip.de |
200.109.210.233 | 200-109-210-233.mil-06-p75.cantv.net |
83.100.8.2 | 83-100-8-2.rev.dnainternet.fi |
35.180.105.116 | ec2-35-180-105-116.eu-west-3.compute.amazonaws.com |