51.81.163.64
Whitelisted netblocks are typically owned by trusted entities, such as Google or Microsoft who may use them for search engine spiders. However, these same entities sometimes also provide cloud servers and mail services which are easily abused. Pay special attention when trusting or distrusting these IPs.
51.81.163.64 is an IP address from within our whitelist belonging to the subnet 51.81.163.64/28, which we identify as "Ahrefs Crawler".
| ISP | OVH US LLC |
|---|---|
| Usage Type | Data Center/Web Hosting/Transit |
| ASN | AS16276 |
| Hostname(s) | proxy-us-west002-cip1.ahrefs.net |
| Domain Name | ovhcloud.com |
| Country | 🇺🇸 United States of America |
| City | Hillsboro, Oregon |
ISP, Usage Type, and Location provided by IPInfo. Updated weekly.
IP Abuse Reports for 51.81.163.64
This IP address has been reported a total of 42 times from 16 distinct sources. 51.81.163.64 was first reported on , and the most recent report was . In the last 60 days, the top reporter locations were: Germany with 17 reports; Canada with 9 reports; United States of America with 9 reports. The most common categories in these recent reports were: Bad Web Bot 34 times; Web App Attack 9 times; Brute-Force 8 times; DDoS Attack 5 times; Exploited Host 5 times; Other 7 times.
| Reporter | IoA Timestamp (UTC) | Comment | Categories | |
|---|---|---|---|---|
| Anonymous |
|
Bad Web Bot | ||
| 🇨🇦 Mediashaker |
|
Bad Web Bot | ||
| 🇩🇪 rh24 |
|
Bad Web Bot | ||
| 🇺🇸 johnkarlhill |
WebKnight blocked malicious web request on johnkarlhill.com
|
Brute-Force SSH | ||
| 🇩🇪 palzer.IT |
|
Bad Web Bot | ||
| 🇺🇸 mawan |
Suspected of having performed illicit activity on LAX server.
|
Web App Attack | ||
| 🇨🇦 Mediashaker |
|
Bad Web Bot | ||
| 🇩🇪 palzer.IT |
|
Bad Web Bot | ||
| 🇩🇪 ghostwarriors |
Webpage scraping
|
Brute-Force Bad Web Bot Web App Attack | ||
| 🇨🇦 Mediashaker |
|
Bad Web Bot | ||
| 🇩🇪 ghostwarriors |
Webpage scraping
|
Brute-Force Bad Web Bot Web App Attack | ||
| 🇨🇦 Mediashaker |
|
Bad Web Bot | ||
| 🇮🇪 Jim Keir |
2026-09-20 16:03:48 51.81.163.64 Bad bot, blocking Mozilla/5.0
|
Bad Web Bot | ||
| 🇨🇦 Mediashaker |
|
Bad Web Bot | ||
| 🇩🇪 palzer.IT |
|
Bad Web Bot |
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