diff --git a/libc/config/linux/aarch64/entrypoints.txt b/libc/config/linux/aarch64/entrypoints.txt
--- a/libc/config/linux/aarch64/entrypoints.txt
+++ b/libc/config/linux/aarch64/entrypoints.txt
@@ -321,6 +321,8 @@
     # network.h entrypoints
     libc.src.network.htonl
     libc.src.network.htons
+    libc.src.network.ntohl
+    libc.src.network.ntohs
 
     # pthread.h entrypoints
     libc.src.pthread.pthread_atfork
diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt
--- a/libc/config/linux/x86_64/entrypoints.txt
+++ b/libc/config/linux/x86_64/entrypoints.txt
@@ -334,6 +334,8 @@
     # network.h entrypoints
     libc.src.network.htonl
     libc.src.network.htons
+    libc.src.network.ntohl
+    libc.src.network.ntohs
 
     # pthread.h entrypoints
     libc.src.pthread.pthread_atfork
diff --git a/libc/spec/posix.td b/libc/spec/posix.td
--- a/libc/spec/posix.td
+++ b/libc/spec/posix.td
@@ -814,6 +814,16 @@
               RetValSpec<UInt16Type>,
               [ArgSpec<UInt16Type>]
           >,
+          FunctionSpec<
+              "ntohl",
+              RetValSpec<UInt32Type>,
+              [ArgSpec<UInt32Type>]
+          >,
+          FunctionSpec<
+              "ntohs",
+              RetValSpec<UInt16Type>,
+              [ArgSpec<UInt16Type>]
+          >,
       ]
   >;
 
diff --git a/libc/src/network/CMakeLists.txt b/libc/src/network/CMakeLists.txt
--- a/libc/src/network/CMakeLists.txt
+++ b/libc/src/network/CMakeLists.txt
@@ -19,3 +19,25 @@
     libc.include.arpa_inet
     libc.src.__support.common
 )
+
+add_entrypoint_object(
+  ntohl
+  SRCS
+    ntohl.cpp
+  HDRS
+    ntohl.h
+  DEPENDS
+    libc.include.arpa_inet
+    libc.src.__support.common
+)
+
+add_entrypoint_object(
+  ntohs
+  SRCS
+    ntohs.cpp
+  HDRS
+    ntohs.h
+  DEPENDS
+    libc.include.arpa_inet
+    libc.src.__support.common
+)
diff --git a/libc/src/network/htons.h b/libc/src/network/htons.h
--- a/libc/src/network/htons.h
+++ b/libc/src/network/htons.h
@@ -13,7 +13,7 @@
 
 namespace __llvm_libc {
 
-uint16_t htons(uint16_t hostlong);
+uint16_t htons(uint16_t hostshort);
 
 } // namespace __llvm_libc
 
diff --git a/libc/src/network/htons.h b/libc/src/network/ntohl.h
copy from libc/src/network/htons.h
copy to libc/src/network/ntohl.h
--- a/libc/src/network/htons.h
+++ b/libc/src/network/ntohl.h
@@ -1,4 +1,4 @@
-//===-- Implementation header of htons --------------------------*- C++ -*-===//
+//===-- Implementation header of ntohl --------------------------*- C++ -*-===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
@@ -6,15 +6,15 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_LIBC_SRC_NETWORK_HTONS_H
-#define LLVM_LIBC_SRC_NETWORK_HTONS_H
+#ifndef LLVM_LIBC_SRC_NETWORK_NTOHL_H
+#define LLVM_LIBC_SRC_NETWORK_NTOHL_H
 
 #include <stdint.h>
 
 namespace __llvm_libc {
 
-uint16_t htons(uint16_t hostlong);
+uint32_t ntohl(uint32_t netlong);
 
 } // namespace __llvm_libc
 
-#endif // LLVM_LIBC_SRC_NETWORK_HTONS_H
+#endif // LLVM_LIBC_SRC_NETWORK_NTOHL_H
diff --git a/libc/src/network/htons.h b/libc/src/network/ntohl.cpp
copy from libc/src/network/htons.h
copy to libc/src/network/ntohl.cpp
--- a/libc/src/network/htons.h
+++ b/libc/src/network/ntohl.cpp
@@ -1,4 +1,4 @@
-//===-- Implementation header of htons --------------------------*- C++ -*-===//
+//===-- Implementation of ntohl function ----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
@@ -6,15 +6,17 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_LIBC_SRC_NETWORK_HTONS_H
-#define LLVM_LIBC_SRC_NETWORK_HTONS_H
-
-#include <stdint.h>
+#include "src/network/ntohl.h"
+#include "src/__support/common.h"
+#include "src/__support/endian.h"
 
 namespace __llvm_libc {
 
-uint16_t htons(uint16_t hostlong);
+LLVM_LIBC_FUNCTION(uint32_t, ntohl, (uint32_t netlong)) {
+  if constexpr (Endian::IS_LITTLE)
+    return __builtin_bswap32(netlong);
+  else
+    return netlong;
+}
 
 } // namespace __llvm_libc
-
-#endif // LLVM_LIBC_SRC_NETWORK_HTONS_H
diff --git a/libc/src/network/htons.h b/libc/src/network/ntohs.h
copy from libc/src/network/htons.h
copy to libc/src/network/ntohs.h
--- a/libc/src/network/htons.h
+++ b/libc/src/network/ntohs.h
@@ -1,4 +1,4 @@
-//===-- Implementation header of htons --------------------------*- C++ -*-===//
+//===-- Implementation header of ntohs --------------------------*- C++ -*-===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
@@ -6,15 +6,15 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_LIBC_SRC_NETWORK_HTONS_H
-#define LLVM_LIBC_SRC_NETWORK_HTONS_H
+#ifndef LLVM_LIBC_SRC_NETWORK_NTOHS_H
+#define LLVM_LIBC_SRC_NETWORK_NTOHS_H
 
 #include <stdint.h>
 
 namespace __llvm_libc {
 
-uint16_t htons(uint16_t hostlong);
+uint16_t ntohs(uint16_t netshort);
 
 } // namespace __llvm_libc
 
-#endif // LLVM_LIBC_SRC_NETWORK_HTONS_H
+#endif // LLVM_LIBC_SRC_NETWORK_NTOHS_H
diff --git a/libc/src/network/ntohs.cpp b/libc/src/network/ntohs.cpp
new file mode 100644
--- /dev/null
+++ b/libc/src/network/ntohs.cpp
@@ -0,0 +1,22 @@
+//===-- Implementation of ntohs function ----------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/network/ntohs.h"
+#include "src/__support/common.h"
+#include "src/__support/endian.h"
+
+namespace __llvm_libc {
+
+LLVM_LIBC_FUNCTION(uint16_t, ntohs, (uint16_t netshort)) {
+  if constexpr (Endian::IS_LITTLE)
+    return __builtin_bswap16(netshort);
+  else
+    return netshort;
+}
+
+} // namespace __llvm_libc
diff --git a/libc/test/src/network/CMakeLists.txt b/libc/test/src/network/CMakeLists.txt
--- a/libc/test/src/network/CMakeLists.txt
+++ b/libc/test/src/network/CMakeLists.txt
@@ -10,6 +10,7 @@
     20
   DEPENDS
     libc.src.network.htonl
+    libc.src.network.ntohl
 )
 
 add_libc_unittest(
@@ -22,4 +23,31 @@
     20
   DEPENDS
     libc.src.network.htons
+    libc.src.network.ntohs
+)
+
+add_libc_unittest(
+  ntohl
+  SUITE
+    libc_network_unittests
+  SRCS
+    ntohl_test.cpp
+  CXX_STANDARD
+    20
+  DEPENDS
+    libc.src.network.htonl
+    libc.src.network.ntohl
+)
+
+add_libc_unittest(
+  ntohs
+  SUITE
+    libc_network_unittests
+  SRCS
+    ntohs_test.cpp
+  CXX_STANDARD
+    20
+  DEPENDS
+    libc.src.network.htons
+    libc.src.network.ntohs
 )
diff --git a/libc/test/src/network/htonl_test.cpp b/libc/test/src/network/htonl_test.cpp
--- a/libc/test/src/network/htonl_test.cpp
+++ b/libc/test/src/network/htonl_test.cpp
@@ -8,6 +8,7 @@
 
 #include "src/__support/endian.h"
 #include "src/network/htonl.h"
+#include "src/network/ntohl.h"
 #include "test/UnitTest/Test.h"
 
 TEST(LlvmLibcHtonl, SmokeTest) {
@@ -20,3 +21,8 @@
   EXPECT_EQ(__llvm_libc::htonl(original), original);
 #endif
 }
+
+TEST(LlvmLibcHtonl, CompleteTest) {
+  uint32_t original = 0x01234567;
+  EXPECT_EQ(__llvm_libc::htonl(__llvm_libc::ntohl(original)), original);
+}
diff --git a/libc/test/src/network/htons_test.cpp b/libc/test/src/network/htons_test.cpp
--- a/libc/test/src/network/htons_test.cpp
+++ b/libc/test/src/network/htons_test.cpp
@@ -8,6 +8,7 @@
 
 #include "src/__support/endian.h"
 #include "src/network/htons.h"
+#include "src/network/ntohs.h"
 #include "test/UnitTest/Test.h"
 
 TEST(LlvmLibcHtons, SmokeTest) {
@@ -20,3 +21,8 @@
   EXPECT_EQ(__llvm_libc::htons(original), original);
 #endif
 }
+
+TEST(LlvmLibcHtons, CompleteTest) {
+  uint16_t original = 0x0123;
+  EXPECT_EQ(__llvm_libc::htons(__llvm_libc::ntohs(original)), original);
+}
diff --git a/libc/test/src/network/htonl_test.cpp b/libc/test/src/network/ntohl_test.cpp
copy from libc/test/src/network/htonl_test.cpp
copy to libc/test/src/network/ntohl_test.cpp
--- a/libc/test/src/network/htonl_test.cpp
+++ b/libc/test/src/network/ntohl_test.cpp
@@ -1,4 +1,4 @@
-//===-- Unittests for htonl -----------------------------------------------===//
+//===-- Unittests for ntohl -----------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
@@ -8,15 +8,21 @@
 
 #include "src/__support/endian.h"
 #include "src/network/htonl.h"
+#include "src/network/ntohl.h"
 #include "test/UnitTest/Test.h"
 
-TEST(LlvmLibcHtonl, SmokeTest) {
+TEST(LlvmLibcNtohl, SmokeTest) {
   uint32_t original = 0x67452301;
   uint32_t swapped = 0x01234567;
 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
-  EXPECT_EQ(__llvm_libc::htonl(original), swapped);
+  EXPECT_EQ(__llvm_libc::ntohl(original), swapped);
 #endif
 #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
-  EXPECT_EQ(__llvm_libc::htonl(original), original);
+  EXPECT_EQ(__llvm_libc::ntohl(original), original);
 #endif
 }
+
+TEST(LlvmLibcNtohl, CompleteTest) {
+  uint32_t original = 0x01234567;
+  EXPECT_EQ(__llvm_libc::ntohl(__llvm_libc::htonl(original)), original);
+}
diff --git a/libc/test/src/network/htons_test.cpp b/libc/test/src/network/ntohs_test.cpp
copy from libc/test/src/network/htons_test.cpp
copy to libc/test/src/network/ntohs_test.cpp
--- a/libc/test/src/network/htons_test.cpp
+++ b/libc/test/src/network/ntohs_test.cpp
@@ -1,4 +1,4 @@
-//===-- Unittests for htons -----------------------------------------------===//
+//===-- Unittests for ntohs -----------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
@@ -8,15 +8,21 @@
 
 #include "src/__support/endian.h"
 #include "src/network/htons.h"
+#include "src/network/ntohs.h"
 #include "test/UnitTest/Test.h"
 
-TEST(LlvmLibcHtons, SmokeTest) {
+TEST(LlvmLibcNtohs, SmokeTest) {
   uint16_t original = 0x2301;
   uint16_t swapped = 0x0123;
 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
-  EXPECT_EQ(__llvm_libc::htons(original), swapped);
+  EXPECT_EQ(__llvm_libc::ntohs(original), swapped);
 #endif
 #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
-  EXPECT_EQ(__llvm_libc::htons(original), original);
+  EXPECT_EQ(__llvm_libc::ntohs(original), original);
 #endif
 }
+
+TEST(LlvmLibcNtohs, CompleteTest) {
+  uint16_t original = 0x0123;
+  EXPECT_EQ(__llvm_libc::ntohs(__llvm_libc::htons(original)), original);
+}