AS56173 -

internet content provider

AS56173 internet content provider





Network Speed

We don't currently have any network speed data for this network.

Hosted Domains

There are 17,238 domain names hosted across 11 IP addresses on this ASN.

Show Domains

Whois Details

aut-num:        AS56173
as-name:        YAHOO-SG3
descr:          internet content provider
country:        SG
org:            ORG-YA6-AP
admin-c:        YI12-AP
tech-c:         YI12-AP
mnt-by:         APNIC-HM
mnt-routes:     MAINT-AP-YAHOO-INC
mnt-irt:        IRT-YAHOO-AP
mnt-lower:      MAINT-AP-YAHOO-INC
import:         from AS10310
export:         to AS10310
last-modified:  2019-06-09T22:44:20Z
source:         APNIC

mntner:         APNIC-HM
admin-c:        RTT10-RIPE
auth:           MD5-PW
auth:           SSO
auth:           SSO
mnt-by:         APNIC-HM
created:        2019-04-09T03:52:39Z
last-modified:  2019-04-20T09:18:19Z
source:         RIPE

role:           YAHOO INC
address:        701 First Avenue
address:        Sunnyvale, CA 94089
country:        US
phone:          +1 408 349 3300
fax-no:         +1 408 349 3301
remarks:        send spam and abuse reports to
remarks:        or visit
admin-c:        KW133-AP
tech-c:         KW133-AP
tech-c:         SD210-AP
nic-hdl:        YI12-AP
mnt-by:         MAINT-AP-YAHOO-INC
last-modified:  2011-12-06T00:10:14Z
source:         APNIC

IP Address Ranges

Netblock Description Num IPs Yahoo! SG3 16,384 Yahoo! SG3 1,024 Yahoo! SG3 8,192 Yahoo-Inc 8,192 Yahoo-JP1 512 Yahoo SG3 Data Center 1,024 Yahoo SG3 Data Center 1,024 Yahoo-SG1 1,024
Netblock Description
2001:4998:1ac::/46 Oath Holdings Inc.
2406:2000:e4::/46 Yahoo! Taiwan Inc.
2406:2000:ef69::/48 SG3 Data Center office
2406:2000:efa6::/48 Yahoo! Taiwan Inc.

Network Speed

We don't currently have any network speed data for this network.


There is 1 peer for this ASN.


There is 1 upstream for this ASN.


There are no downstreams for this ASN.

Get Started

Utilize our APIs to get information on any IP address including geolocation, ASN and hostname. It is forever FREE for up to 1000 requests per day.

SignUp for free

No Credit card required


Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP.

Find out more about AS56173 at robtex.

Try our JSON API from the command line

Get started with curl or check out the documentation to read more.


Free for small projects. Pay as you grow.

Our API is free for up to 50,000 requests per month. Our plans suit companies of every size.

Plans & Pricing

A million uses. Easy to implement.

From filtering out bot traffic, to performing bulk IP geolocation, we’ve got it all covered.