diff --git a/lib/address.js b/lib/address.js
index b017bc7..a11342b 100644
--- a/lib/address.js
+++ b/lib/address.js
@@ -162,8 +162,9 @@ Address._transformObject = function(data) {
 Address._classifyFromVersion = function(buffer) {
   var version = {};
 
-  var pubkeyhashNetwork = Networks.get(buffer[0], 'pubkeyhash');
-  var scripthashNetwork = Networks.get(buffer[0], 'scripthash');
+  var prefix = buffer[0]*256 + buffer[1];
+  var pubkeyhashNetwork = Networks.get(prefix, 'pubkeyhash');
+  var scripthashNetwork = Networks.get(prefix, 'scripthash');
 
   if (pubkeyhashNetwork) {
     version.network = pubkeyhashNetwork;
@@ -191,8 +192,8 @@ Address._transformBuffer = function(buffer, network, type) {
   if (!(buffer instanceof Buffer) && !(buffer instanceof Uint8Array)) {
     throw new TypeError('Address supplied is not a buffer.');
   }
-  if (buffer.length !== 1 + 20) {
-    throw new TypeError('Address buffers must be exactly 21 bytes.');
+  if (buffer.length !== 2 + 20) {
+    throw new TypeError('Address buffers must be exactly 22 bytes.');
   }
 
   network = Networks.get(network);
@@ -206,7 +207,7 @@ Address._transformBuffer = function(buffer, network, type) {
     throw new TypeError('Address has mismatched type.');
   }
 
-  info.hashBuffer = buffer.slice(1);
+  info.hashBuffer = buffer.slice(2);
   info.network = bufferVersion.network;
   info.type = bufferVersion.type;
   return info;
diff --git a/lib/networks.js b/lib/networks.js
index 1831e61..ba455bb 100644
--- a/lib/networks.js
+++ b/lib/networks.js
@@ -133,9 +133,9 @@ function removeNetwork(network) {
 addNetwork({
   name: 'livenet',
   alias: 'mainnet',
-  pubkeyhash: 0x00,
+  pubkeyhash: 0x1cb8,
   privatekey: 0x80,
-  scripthash: 0x05,
+  scripthash: 0x1cbd,
   xpubkey: 0x0488b21e,
   xprivkey: 0x0488ade4,
   zaddr: 0x169a,
@@ -161,13 +161,13 @@ var livenet = get('livenet');
 addNetwork({
   name: 'testnet',
   alias: 'regtest',
-  pubkeyhash: 0x6f,
+  pubkeyhash: 0x1d25,
   privatekey: 0xef,
-  scripthash: 0xc4,
+  scripthash: 0x1cba,
   xpubkey: 0x043587cf,
   xprivkey: 0x04358394,
-  zaddr: 0x1451,
-  zkey: 0xb1eb,
+  zaddr: 0x16b6,
+  zkey: 0xac08,
 });
 
 /**
@@ -180,9 +180,9 @@ var testnet = get('testnet');
 
 var TESTNET = {
   PORT: 18233,
-  NETWORK_MAGIC: BufferUtil.integerAsBuffer(0xa5f1e726),
+  NETWORK_MAGIC: BufferUtil.integerAsBuffer(0x0c9ed7a2),
   DNS_SEEDS: [
-    'dns.testnet.z.cash',
+    'dnsseed.testnet.z.cash',
   ]
 };