DNS Server: OPTICAL TECHNOLOGIES - Lima

The following is the list of DNS addresses provided by OPTICAL TECHNOLOGIES - Lima:

190.12.72.226

190.12.95.170

DNS servers are generally placed in the city where the DNS provider is located or in the main city of a province/state. If the DNS provider has multiple DNS addresses and operates in multiple locations, the DNS servers may also be distributed in multiple locations. Here's where OPTICAL TECHNOLOGIES - Lima's servers are placed:

190.12.72.226	Lima - Lima
190.12.95.170	Lima - Lima

In addition to the servers of Internet service providers and domain name registries, there are 13 root name servers all over the world. Among them, one is the main root name server operated by Network Solutions in the United States. The other 12 are secondary root name servers, of which 9 are in the US, 2 are in Europe (placed in the UK and Sweden), and 1 is in Asia (placed in Japan).

DNS server can help convert domain names into IP addresses that can be easily recognized by computer network so that people's network devices can communicate correctly. The DNS server addresses vary from region to region. If i currently use OPTICAL TECHNOLOGIES - Lima network, it is better to use OPTICAL TECHNOLOGIES - Lima DNS synchrononly. So how to check if my device is using OPTICAL TECHNOLOGIES - Lima DNS? Here offer different methods from different platforms. If the DNS address viewed is in our list, it means I'm currently using OPTICAL TECHNOLOGIES - Lima DNS; if not, it means I'm not using OPTICAL TECHNOLOGIES - Lima DNS.

On computer

Windows system

Method 1: Go to the Network and Sharing Center to view the DNS address

• Open the Control Panel and find "Network and Sharing Center".
• Click "View Network Status and Tasks" under "Network and Sharing Center" to view the currently connected network.
• Click the connected network, and click "Details" in the pop-up interface to view the detailed information of the current network.
• In the details panel, you can view your computer's DNS.

Method 2: Use the command to view the DNS address

• Click the Windows+R key combination to pop up the window to run command .
• Enter the "cmd" in the command window, and click "OK".
• In the open "cmd" command window, enter the "ipconfig /all" and press Enter.
• In the returned information, you can find your computer's DNS is displayed on the right of DNS server option.

On mobile phone

iPhone

• Connect your phone to WIFI and open the settings.
• In the settings interface, select WLAN and check the list of connectable networks.
• Click the connected WIFI to view your current network details.
• Find the DNS option and click "Configure DNS" to view your DNS server address.

Android

• Connect your phone to WIFI and open the settings.
• In the settings interface, select WLAN and check the list of connectable networks.
• Click the connected WIFI to view your current network details.
• Click IP settings and select "static" to view your current DNS server address.

The DNS address in the above case is 192.168.100.1, which is using the router's gateway by default. Here's how to check your router's DNS address.

On router

• Enter the router's login IP address in the browser address bar, such as 192.168.100.1 (the login IP of different brands of routers may be different), and then enter the user name and password to log in.
• After logging in to the router management interface, click the "Internet".
• In the Internet interface, you can check the DNS address of your router. If there is no specified DNS address and you choose to obtain it dynamically from the ISP, then you need to find the upper-level ISP to know your DNS address.

Many people have encountered network lag or inability to access the Internet. There are many reasons for this situation, one of which may be caused by incorrect DNS settings. Therefore, it is recommended to use local operator's DNS. For example, if you use OPTICAL TECHNOLOGIES - Lima Internet but set DNS to Guangzhou Mobile, it will cause operators to visit across regions, which may result in many adverse consequences, such as unable to open web pages, slow upload and download speed, network video jam, etc. Changing DNS is a good way to solve the bad situation. The following is the modification methods.

On computer

Windows system

• Open the Control Panel and find "Network and Sharing Center".
• Click "View Network Status and Tasks" under "Network and Sharing Center" to view the currently connected networks.
• Click the network you are connected to and check the status of the current network.
• Click "Properties" to go to the WLAN Properties window.
• Click "Internet Protocol Version 4 (TCP/IPv4)", and then click "Properties" to configure it.
• Find the DNS server option and change the preferred and alternate DNS address to OPTICAL TECHNOLOGIES - Lima's DNS address, and click "OK" to make the settings take effect.

On mobile phone

iPhone

• Connect your phone to WIFI and open the settings.
• In the settings interface, select WLAN and check the list of connectable networks.
• Click the connected WIFI to view your current network details.
• Find the DNS option and click "Configure DNS" to view your DNS server address.
• Click "Manual" to change the current DNS address to OPTICAL TECHNOLOGIES - Lima DNS, and then click "Save" to make the settings take effect.

Android

• Connect your phone to WIFI and open the settings.
• In the settings interface, select WLAN and check the list of connectable networks.
• Click the connected WIFI to view your current network details.
• Click IP settings and select "static" to view your current DNS server address. You can change it to OPTICAL TECHNOLOGIES - Lima DNS, and click the "√" to save settings.

On router

• Enter the router's login IP address in the browser address bar, such as 192.168.100.1 (the login IP of different brands of routers may be different), and then enter the user name and password to log in.
• After logging in to the router management interface, click the "Internet".
• In the Internet interface, click "Use the following DNS server", then fill in the DNS address of OPTICAL TECHNOLOGIES - Lima you want to use, and finally click "Apply" to make the settings take effect.

OPTICAL TECHNOLOGIES - Lima doesn't provide IPv6 public DNS addresses yet. Currently, only a few DNS providers worldwide support IPv6 public DNS addresses. This site lists some of the IPv6 public DNS addresses collected for your reference.

China

Baidu

2400:da00::6666

Alibaba

Preferred DNS: 2400:3200::1 Alternate DNS: 2400:3200:baba::1

BII

Preferred DNS: 240C::6666 Alternate DNS: 240C::6644

The United States

Google

Preferred DNS: 2001:4860:4860::8888 Alternate DNS: 2001:4860:4860::8844

CloudFlare

Preferred DNS: 2606:4700:4700::1111 Alternate DNS: 2606:4700:4700::1001

Quad9

Preferred DNS: 2620:fe::fe Alternate DNS: 2620:fe::9

OpenDNS

Preferred DNS: 2620:0:ccc::2 Alternate DNS: 2620:0:ccd::2

Hurricane Electric

Preferred DNS: 2001:470:20::2 Alternate DNS: 2001:470:0:9d::2

Verisign

Preferred DNS: 2620:74:1b::1:1 Alternate DNS: 2620:74:1c::2:2

Neustar Recursive

Preferred DNS: 2610:a1:1018::1 Alternate DNS: 2610:a1:1019::1

Russia

Yandex

Preferred DNS: 2a02:6b8::feed:0ff Alternate DNS: 2a02:6b8:0:1::feed:0ff

Germany

DNS.WATCH

Preferred DNS: 2001:1608:10:25::1c04:b12f Alternate DNS: 2001:1608:10:25::9249:d69b

Switzerland

xiala.net

Preferred DNS: 2001:1620:2078:136:: Alternate DNS: 2001:1620:2078:137::

Denmark

UncensoredDNS

Preferred DNS: 2001:67c:28a4:: Alternate DNS: 2a01:3a0:53:53::

After testing, OPTICAL TECHNOLOGIES - Lima DNS server does not support DNSSEC.

DNSSEC stands for Domain Name System Security Extensions. If DNSSEC is enabled, attacks such as DNS spoofing (also known as domain name hijacking) and cache pollution can be effectively prevented. It ensures the authenticity and integrity of DNS response messages through digital signatures based on public key cryptography, and can protect users from being redirected to unexpected addresses, thereby improving your trust in the Internet and protecting your core business.

If your network is OPTICAL TECHNOLOGIES - Lima, it is better to use OPTICAL TECHNOLOGIES - Lima DNS server address. Because the distance between our devices and ISP's network is the shortest, setting devices' DNS server address to local ISP's DNS address can maximize the exchange speed between our devices and the network and reduce the waiting time. In fact, most home networks' DNS uses the ISP's DNS server addresses by default.

However, if you use OPTICAL TECHNOLOGIES - Lima's network but not OPTICAL TECHNOLOGIES - Lima's DNS, or do not use OPTICAL TECHNOLOGIES - Lima's network but use OPTICAL TECHNOLOGIES - Lima's DNS, don't worry, you can surf the Internet normally, but i'm afraid your network speed will be affected in a certain extent and the domain name resolution time will be slightly longer.

If you change your devices' DNS address to OPTICAL TECHNOLOGIES - Lima DNS, your device will start to use the DNS of OPTICAL TECHNOLOGIES - Lima as soon as it finished modification.

If you modify the DNS record of the domain name, the final effective time of the DNS resolution record depends on the cache refresh time of the DNS server of the local operator.

Because after the modification of DNS, it is necessary to wait for the TTL cache of the domain name DNS server in the local DNS to expire, and the local DNS will reinitiate the recursive query, and then the records of global serve can be synchronized to the latest domain name DNS server. However, the refresh time of DNS in different places varies and takes a long time, it generally takes 24~48 hours for the resolution to take effect globally (.com needs 48 hours and .cn needs 24 hours). Therefore, if the domain name resolution record is modified, it generally takes 24~48 hours for the resolution record of OPTICAL TECHNOLOGIES - Lima to take effect. It may take effect in a few minutes if quickly, and more than 72 hours if slowly.