diff --git a/Userland/Services/LookupServer/DNSAnswer.cpp b/Userland/Services/LookupServer/DNSAnswer.cpp
index 775c23784e..78c5ef011d 100644
--- a/Userland/Services/LookupServer/DNSAnswer.cpp
+++ b/Userland/Services/LookupServer/DNSAnswer.cpp
@@ -27,6 +27,8 @@
 #include "DNSAnswer.h"
 #include <time.h>
 
+namespace LookupServer {
+
 DNSAnswer::DNSAnswer(const String& name, u16 type, u16 class_code, u32 ttl, const String& record_data)
     : m_name(name)
     , m_type(type)
@@ -44,3 +46,5 @@ bool DNSAnswer::has_expired() const
 {
     return time(nullptr) >= m_expiration_time;
 }
+
+}
diff --git a/Userland/Services/LookupServer/DNSAnswer.h b/Userland/Services/LookupServer/DNSAnswer.h
index 794603dd30..c86f0e1db8 100644
--- a/Userland/Services/LookupServer/DNSAnswer.h
+++ b/Userland/Services/LookupServer/DNSAnswer.h
@@ -29,6 +29,8 @@
 #include <AK/String.h>
 #include <AK/Types.h>
 
+namespace LookupServer {
+
 class DNSAnswer {
 public:
     DNSAnswer(const String& name, u16 type, u16 class_code, u32 ttl, const String& record_data);
@@ -49,3 +51,5 @@ private:
     time_t m_expiration_time { 0 };
     String m_record_data;
 };
+
+}
diff --git a/Userland/Services/LookupServer/DNSPacket.h b/Userland/Services/LookupServer/DNSPacket.h
index 1cddc372c7..22f9e7f1d2 100644
--- a/Userland/Services/LookupServer/DNSPacket.h
+++ b/Userland/Services/LookupServer/DNSPacket.h
@@ -29,6 +29,8 @@
 #include <AK/Endian.h>
 #include <AK/Types.h>
 
+namespace LookupServer {
+
 class [[gnu::packed]] DNSPacket {
 public:
     DNSPacket()
@@ -113,3 +115,5 @@ private:
 };
 
 static_assert(sizeof(DNSPacket) == 12);
+
+}
diff --git a/Userland/Services/LookupServer/DNSRequest.cpp b/Userland/Services/LookupServer/DNSRequest.cpp
index 561e988ac9..9770eeb258 100644
--- a/Userland/Services/LookupServer/DNSRequest.cpp
+++ b/Userland/Services/LookupServer/DNSRequest.cpp
@@ -32,6 +32,8 @@
 #include <ctype.h>
 #include <stdlib.h>
 
+namespace LookupServer {
+
 const u16 C_IN = 1;
 
 DNSRequest::DNSRequest()
@@ -94,3 +96,5 @@ ByteBuffer DNSRequest::to_byte_buffer() const
 
     return stream.copy_into_contiguous_buffer();
 }
+
+}
diff --git a/Userland/Services/LookupServer/DNSRequest.h b/Userland/Services/LookupServer/DNSRequest.h
index 2b55dd75fb..71da4acd14 100644
--- a/Userland/Services/LookupServer/DNSRequest.h
+++ b/Userland/Services/LookupServer/DNSRequest.h
@@ -37,6 +37,8 @@
 #define T_PTR 12
 #define T_MX 15
 
+namespace LookupServer {
+
 enum class ShouldRandomizeCase {
     No = 0,
     Yes
@@ -63,3 +65,5 @@ private:
     u16 m_id { 0 };
     Vector<DNSQuestion> m_questions;
 };
+
+}
diff --git a/Userland/Services/LookupServer/DNSResponse.cpp b/Userland/Services/LookupServer/DNSResponse.cpp
index ab12c0c48d..b14fd585ad 100644
--- a/Userland/Services/LookupServer/DNSResponse.cpp
+++ b/Userland/Services/LookupServer/DNSResponse.cpp
@@ -31,6 +31,8 @@
 #include <AK/IPv4Address.h>
 #include <AK/StringBuilder.h>
 
+namespace LookupServer {
+
 static String parse_dns_name(const u8* data, size_t& offset, size_t max_offset, size_t recursion_level = 0);
 
 class [[gnu::packed]] DNSRecordWithoutName {
@@ -151,3 +153,5 @@ String parse_dns_name(const u8* data, size_t& offset, size_t max_offset, size_t
     }
     return String::copy(buf);
 }
+
+}
diff --git a/Userland/Services/LookupServer/DNSResponse.h b/Userland/Services/LookupServer/DNSResponse.h
index 2bfe17fecd..bfffb23561 100644
--- a/Userland/Services/LookupServer/DNSResponse.h
+++ b/Userland/Services/LookupServer/DNSResponse.h
@@ -32,6 +32,8 @@
 #include <AK/Types.h>
 #include <AK/Vector.h>
 
+namespace LookupServer {
+
 class DNSResponse {
 public:
     static Optional<DNSResponse> from_raw_response(const u8*, size_t);
@@ -75,3 +77,5 @@ private:
     Vector<DNSQuestion> m_questions;
     Vector<DNSAnswer> m_answers;
 };
+
+}
diff --git a/Userland/Services/LookupServer/LookupServer.cpp b/Userland/Services/LookupServer/LookupServer.cpp
index 238f8387ab..1f6ac5081e 100644
--- a/Userland/Services/LookupServer/LookupServer.cpp
+++ b/Userland/Services/LookupServer/LookupServer.cpp
@@ -41,6 +41,8 @@
 #include <sys/time.h>
 #include <unistd.h>
 
+namespace LookupServer {
+
 LookupServer::LookupServer()
 {
     auto config = Core::ConfigFile::get_for_system("LookupServer");
@@ -277,3 +279,5 @@ Vector<String> LookupServer::lookup(const String& hostname, const String& namese
     }
     return responses;
 }
+
+}
diff --git a/Userland/Services/LookupServer/LookupServer.h b/Userland/Services/LookupServer/LookupServer.h
index b2ecf414cb..3f1bcfe574 100644
--- a/Userland/Services/LookupServer/LookupServer.h
+++ b/Userland/Services/LookupServer/LookupServer.h
@@ -30,6 +30,8 @@
 #include "DNSResponse.h"
 #include <LibCore/Object.h>
 
+namespace LookupServer {
+
 class DNSAnswer;
 
 class LookupServer final : public Core::Object {
@@ -53,3 +55,5 @@ private:
     HashMap<String, String> m_etc_hosts;
     HashMap<String, CachedLookup> m_lookup_cache;
 };
+
+}
diff --git a/Userland/Services/LookupServer/main.cpp b/Userland/Services/LookupServer/main.cpp
index 501e324158..4d566ca8a9 100644
--- a/Userland/Services/LookupServer/main.cpp
+++ b/Userland/Services/LookupServer/main.cpp
@@ -37,7 +37,7 @@ int main([[maybe_unused]] int argc, [[maybe_unused]] char** argv)
     }
 
     Core::EventLoop event_loop;
-    auto server = LookupServer::construct();
+    auto server = LookupServer::LookupServer::construct();
 
     if (pledge("stdio accept inet", nullptr) < 0) {
         perror("pledge");