10.20.40.1 router login
To open the admin panel, type 10.20.40.1 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.
10.20.40.1 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 is known for this address, and on gateway-position addresses in 10.0.0.0/8 that is often because there is no published default to know. Equipment in managed and enterprise environments is commissioned with credentials chosen by the network team, frequently backed by a central directory or RADIUS. If this is your own hardware, read the defaults off its service label or the manual matching that model. If it belongs to an employer or a provider, access is granted by them rather than recovered by you.
How to log in to your router
Type 10.20.40.1 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 10.20.40.1, 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
Treat a factory reset on a gateway at 10.20.40.1 as a last resort. Wiping it drops routing, DHCP scopes, firewall policy, VPN tunnels and any VLAN trunking configuration, and everything downstream loses connectivity until the configuration is rebuilt from a backup or from scratch. On managed or provider-owned equipment a reset may also strip provisioning that only the operator can reapply.
With no vendor identified for this address, consult the documentation for the actual unit. Where console access exists, a password-recovery or rommon procedure is usually preferable to a full erase.
10.20.40.1 sits inside 10.0.0.0/8, the largest of the RFC 1918 private ranges. Its natural mask of 255.0.0.0 spans 16,777,216 addresses, and it is common in corporate and campus networks, ISP-managed CPE, carrier-grade equipment, VPN address pools and container or orchestration networks, where the address space is subnetted far below /8. That vast size is exactly why no organisation can be attached to the number: private space is unrouted on the public internet and reused freely by anyone.
The working subnet here is 10.20.40.0/24, offering 10.20.40.1 through 10.20.40.254 to hosts with 10.20.40.255 as broadcast. This address takes host position 1, the first usable slot and the position most administrators reserve for the default gateway of the segment. Octet patterns like 20 and 40 usually encode a site or VLAN scheme within a larger plan, which is characteristic of a managed network rather than a consumer one. Only one other address in this /24 has been documented, consistent with a segment defined by its router.
People looking this up are typically trying to reach a gateway or firewall interface after finding it listed as the default route on a work laptop, VPN client or managed access point.
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 10.20.40.0/24
The 10.20.40.0/24 subnet runs from 10.20.40.1 to 10.20.40.254, with 10.20.40.255 reserved as the broadcast address. These are the addresses in it we hold router login details for.
All addresses we cover here
2 addresses in this subnet have a page; the most looked-up are listed here.