diff --git a/src/hosts.zig b/src/hosts.zig
index 810a895..041528b 100644
--- a/src/hosts.zig
+++ b/src/hosts.zig
@@ -3,6 +3,8 @@ const util = @import("util.zig");
 
 const hosts_header = "# local-etc-hosts-updater";
 
+const FILE_LINE_BUFF_SIZE = 50;
+
 pub fn update_hosts(ip: util.IP) !void {
     try create_tmp_hosts(ip);
     try move_tmp_hosts();
@@ -20,7 +22,7 @@ inline fn check_purge(line: []u8, purging: *bool, skip_last_line: *bool) void {
 }
 
 fn purge_existing(old_hosts: std.fs.File, tmp_hosts: std.fs.File) !void {
-    var buff = [_]u8{0x00} ** 50;
+    var buff = [_]u8{0x00} ** FILE_LINE_BUFF_SIZE;
     var buff_stream = std.io.fixedBufferStream(&buff);
     const buff_reader = buff_stream.reader();
     const buff_writer = buff_stream.writer();
@@ -29,7 +31,7 @@ fn purge_existing(old_hosts: std.fs.File, tmp_hosts: std.fs.File) !void {
 
     var purging = false;
     var skip_last_line = false;
-    while (old_reader.streamUntilDelimiter(buff_writer, '\n', 50 - 1)) |_| {
+    while (old_reader.streamUntilDelimiter(buff_writer, '\n', FILE_LINE_BUFF_SIZE - 1)) |_| {
         defer buff_stream.pos = 0;
         var n = buff_stream.pos;
         // do things to line
@@ -41,14 +43,16 @@ fn purge_existing(old_hosts: std.fs.File, tmp_hosts: std.fs.File) !void {
         }
         if (skip_last_line) {
             skip_last_line = false;
-            continue;
+            if (std.mem.eql(u8, buff[0..n], "")) {
+                continue;
+            }
         }
 
         // copy line
         buff[n] = '\n';
         n += 1;
         buff_stream.pos = 0;
-        try buff_reader.streamUntilDelimiter(tmp_writer, '\n', 50);
+        try buff_reader.streamUntilDelimiter(tmp_writer, '\n', FILE_LINE_BUFF_SIZE);
         try tmp_writer.writeByte('\n');
     } else |err| {
         if (err != error.EndOfStream) {
@@ -58,9 +62,8 @@ fn purge_existing(old_hosts: std.fs.File, tmp_hosts: std.fs.File) !void {
 }
 
 fn append_new(tmp_hosts: std.fs.File, addr: std.net.Address) !void {
-    _ = addr;
     const writer = tmp_hosts.writer();
-    var buff = [_]u8{0x00} ** 50;
+    var buff = [_]u8{0x00} ** FILE_LINE_BUFF_SIZE;
 
     // write output
     const header_len = hosts_header.*.len;
@@ -70,9 +73,19 @@ fn append_new(tmp_hosts: std.fs.File, addr: std.net.Address) !void {
 
     var subdomains = try get_subdomains();
     const domain = try util.getenv("TARGET_DOMAIN");
-    while (subdomains.next()) |subdomain| {
-        std.debug.print("{s}.{s}\n", .{ subdomain, domain });
+
+    var addr_buff = [_]u8{0x00} ** 50;
+    var addr_str = try std.fmt.bufPrint(&addr_buff, "{}", .{addr});
+    if (addr_str[0] == '[') {
+        addr_str = addr_str[1 .. addr_str.len - 3]; // [fd00::0000]:0
+    } else {
+        addr_str = addr_str[0 .. addr_str.len - 2]; // 192.168.0.0:0
     }
+
+    while (subdomains.next()) |subdomain| {
+        try std.fmt.format(writer, "{s} {s}.{s}\n", .{ addr_str, subdomain, domain });
+    }
+
     // add extra final newline
     try writer.writeByte('\n');
 }