useful tools updated

docs/zetachain/sync/addrbook.mdx

@@ -12,7 +12,6 @@ import SelectPaste from '@site/src/components/SelectPaste';
 import { addrBook }  from '@site/src/components/SelectPaste/addrBook.ts';
 
 export let endpoints = [
-	'https://f5nodes.com',
 	'https://snapshots.polkachu.com/testnet-addrbook/zetachain/addrbook.json',
 	'https://snapshots-testnet.nodejumper.io/zetachain-testnet/addrbook.json',
 	'https://ss-t.zeta.nodestake.top/addrbook.json',

docs/zetachain/useful-tools/explorers.md

@@ -0,0 +1,45 @@
+---
+sidebar_position: 1
+description: Explorers
+---
+
+# Explorers
+
+> A block explorer is a search engine that allows users to access and explore the contents of individual blocks, transactions, validators, and addresses on a blockchain. It provides a visual interface to navigate the intricate details of blockchain operations. Through a block explorer, users can verify transactions, check balances of addresses, and track the history and state of the blockchain.
+
+There are a number of explorers that you can use for ZetaChain:
+
+#### ZetaScan
+```bash
+https://explorer.zetachain.com
+```
+
+#### Blockscout
+```bash
+https://zetachain-athens-3.blockscout.com
+```
+
+#### Nodes.Guru: 
+```bash
+https://zetachain.explorers.guru
+```
+
+#### NodeStake
+```bash
+https://explorer.nodestake.top/zeta-testnet
+```
+
+#### kjnodes 
+```bash
+https://explorer.kjnodes.com/zetachain-testnet
+```
+
+#### ITRocket
+```bash
+https://testnet.itrocket.net/zetachain
+```
+
+#### StakeMe
+```bash
+https://zetachain.exploreme.pro
+```