10.21.2.20 router login
To open the admin panel, type 10.21.2.20 into your browser's address bar. If the page does not load, this is probably not the gateway address on your network — see the checks below.
10.21.2.20 router passwords
Where to find them:
- The label on the underside or back of the router — most manufacturers print the default admin username, password and Wi-Fi key there.
- The quick-start card or manual that came in the box.
- Your ISP's account portal, if the device was supplied by them — many set a unique password per line rather than a shared default.
No default username and password are documented for 10.21.2.20. Many devices sitting at a plain host address expose no administrative login whatsoever. If one is present, its factory credentials belong to the hardware, not the address, and are found on the unit's label, in its manual, or from the team that deployed it.
How to log in to your router
Type 10.21.2.20 into your browser's address bar and press Enter. Type it by hand rather than accepting an autocomplete suggestion, which often fills in a different address you visited before.
If the browser reports that it cannot reach 10.21.2.20, this is not the gateway address on your network. On Windows run ipconfig /all and read the Default Gateway line; on macOS open System Settings, Network, Details, TCP/IP; on Linux run ip route and read the address after "default via".
If the login page loads but rejects your credentials, and you have never changed them, use the defaults printed on the device's label. If they have been changed and nobody knows the new password, a factory reset is the only way back in.
If you do not know the password
With no working password, the fallback is a factory reset of the device itself, following the procedure in its documentation. Everything configured since deployment goes: fixed addressing, service settings and user accounts return to shipping state, and on wireless equipment the broadcast network name and key change back to the printed defaults, so client devices must be rejoined.
This address falls inside 10.0.0.0/8, the private range that RFC 1918 reserves and that a 255.0.0.0 netmask stretches across 16,777,216 addresses. Networks that use it break it into far smaller pieces; the one here is 10.21.2.0/24, offering 10.21.2.1 through 10.21.2.254 for hosts and reserving 10.21.2.255 for broadcast traffic.
Host 20 is a mid-range slot with no special meaning, and it is not one of the positions conventionally handed to a gateway. Just two other addresses in this subnet are documented, so little is recorded about the segment as a whole. Typical reasons for looking it up include tracing a device that appeared in an inventory scan, checking a static assignment before reusing it, or working out whether a connection attempt to this address should have succeeded.
Whois information for 10.0.0.0/8
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2024, American Registry for Internet Numbers, Ltd.
#
NetRange: 10.0.0.0 - 10.255.255.255
CIDR: 10.0.0.0/8
NetName: PRIVATE-ADDRESS-ABLK-RFC1918-IANA-RESERVED
NetHandle: NET-10-0-0-0-1
Parent: ()
NetType: IANA Special Use
OriginAS:
Organization: Internet Assigned Numbers Authority (IANA)
RegDate: 1995-06-23
Updated: 2013-08-30
Comment: These addresses are in use by many millions of independently operated networks, which might be as small as a single computer connected to a home gateway, and are automatically configured in hundreds of millions of devices. They are only intended for use within a private context and traffic that needs to cross the Internet will need to use a different, unique address.
Comment:
Comment: These addresses can be used by anyone without any need to coordinate with IANA or an Internet registry. The traffic from these addresses does not come from ICANN or IANA. We are not the source of activity you may see on logs or in e-mail records. Please refer to http://www.iana.org/abuse/answers
Comment:
Comment: These addresses were assigned by the IETF, the organization that develops Internet protocols, in the Best Current Practice document, RFC 1918 which can be found at:
Comment: http://datatracker.ietf.org/doc/rfc1918
Ref: https://rdap.arin.net/registry/ip/10.0.0.0
OrgName: Internet Assigned Numbers Authority
OrgId: IANA
Address: 12025 Waterfront Drive
Address: Suite 300
City: Los Angeles
StateProv: CA
PostalCode: 90094
Country: US
RegDate:
Updated: 2012-08-31
Ref: https://rdap.arin.net/registry/entity/IANA
OrgAbuseHandle: IANA-IP-ARIN
OrgAbuseName: ICANN
OrgAbusePhone: +1-310-301-5820
OrgAbuseEmail: abuse@iana.org
OrgAbuseRef: https://rdap.arin.net/registry/entity/IANA-IP-ARIN
OrgTechHandle: IANA-IP-ARIN
OrgTechName: ICANN
OrgTechPhone: +1-310-301-5820
OrgTechEmail: abuse@iana.org
OrgTechRef: https://rdap.arin.net/registry/entity/IANA-IP-ARIN
Other documented addresses in 10.21.2.0/24
The 10.21.2.0/24 subnet runs from 10.21.2.1 to 10.21.2.254, with 10.21.2.255 reserved as the broadcast address. These are the addresses in it we hold router login details for.
All addresses we cover here
3 addresses in this subnet have a page; the most looked-up are listed here.