diff --git a/projects/libphonenumber/Dockerfile b/projects/libphonenumber/Dockerfile
new file mode 100644
index 000000000..c75d78c58
--- /dev/null
+++ b/projects/libphonenumber/Dockerfile
@@ -0,0 +1,26 @@
+# Copyright 2020 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+
+FROM gcr.io/oss-fuzz-base/base-builder
+RUN apt-get update && apt-get install -y autoconf automake libtool g++ cmake-curses-gui libgtest-dev libre2-dev libicu-dev libboost-dev libboost-thread-dev libboost-system-dev binutils ninja-build liblzma-dev libz-dev pkg-config wget openjdk-8-jdk
+
+WORKDIR $SRC/
+RUN git clone https://github.com/google/libphonenumber
+
+RUN wget https://github.com/unicode-org/icu/releases/download/release-55-2/icu4c-55_2-src.tgz && tar xzvf icu4c-55_2-src.tgz
+
+COPY build.sh $SRC/
+COPY phonefuzz.cc $SRC/
diff --git a/projects/libphonenumber/build.sh b/projects/libphonenumber/build.sh
new file mode 100755
index 000000000..ec67ec68e
--- /dev/null
+++ b/projects/libphonenumber/build.sh
@@ -0,0 +1,87 @@
+#!/bin/bash -eu
+# Copyright 2020 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+
+# For coverage build we need to remove some flags when building protobuf and icu
+if [ "$SANITIZER" = "coverage" ]
+then
+    export OCX=$CXXFLAGS
+    export OC=$CFLAGS
+    CF1=${CFLAGS//-fprofile-instr-generate/}
+    export CFLAGS=${CF1//-fcoverage-mapping/}
+    CXF1=${CXXFLAGS//-fprofile-instr-generate/}
+    export CXXFLAGS=${CXF1//-fcoverage-mapping/}
+fi
+
+# Build Protobuf
+git clone https://github.com/google/protobuf.git
+cd protobuf
+git submodule update --init --recursive
+./autogen.sh
+./configure
+make -j$(nproc)
+make install
+ldconfig
+
+
+# Build icu
+export DEPS_PATH=/src/deps/
+mkdir $DEPS_PATH
+
+# build ICU for linking statically.
+cd $SRC/icu/source
+./configure --disable-shared --enable-static --disable-layoutex \
+  --disable-tests --disable-samples --with-data-packaging=static --prefix=$DEPS_PATH
+make install -j$(nproc)
+
+# Ugly ugly hack to get static linking to work for icu.
+cd $DEPS_PATH/lib
+ls *.a | xargs -n1 ar x
+rm *.a
+ar r libicu.a *.{ao,o}
+ln -s libicu.a libicudata.a
+ln -s libicu.a libicuuc.a
+ln -s libicu.a libicui18n.a
+
+if [ "$SANITIZER" = "coverage" ]
+then
+    export CFLAGS=$OC
+    export CXXFLAGS=$OCX
+fi
+
+# Build libphonenumber
+cd $SRC/libphonenumber/cpp
+sed -i 's/set (BUILD_SHARED_LIB true)/set (BUILD_SHARED_LIB false)/g' CMakeLists.txt
+sed -i 's/list (APPEND CMAKE_C_FLAGS "-pthread")/string (APPEND CMAKE_C_FLAGS " -pthread")/g' CMakeLists.txt
+
+mkdir build && cd build
+cmake -DUSE_BOOST=OFF -DBUILD_GEOCODER=OFF -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON \
+      -DICU_UC_INCLUDE_DIR=$SRC/icu/source/comon \
+      -DICU_UC_LIB=$DEPS_PATH/lib/libicuuc.a \
+      -DICU_I18N_INCLUDE_DIR=$SRC/icu/source/i18n/ \
+      -DICU_I18N_LIB=$DEPS_PATH/lib/libicui18n.a  ../
+make
+cd ../
+
+# Build our fuzzer
+cp $SRC/*fuzz.cc .
+$CXX -I/src/libphonenumber/cpp/src $CXXFLAGS -o phonefuzz.o -c phonefuzz.cc
+
+$CXX $CXXFLAGS $LIB_FUZZING_ENGINE phonefuzz.o -o phonefuzz \
+     build/libphonenumber.a $SRC/protobuf/src/.libs/libprotobuf.a \
+     $DEPS_PATH/lib/libicu.a -lpthread
+
+cp phonefuzz $OUT/
diff --git a/projects/libphonenumber/phonefuzz.cc b/projects/libphonenumber/phonefuzz.cc
new file mode 100644
index 000000000..4270f13d8
--- /dev/null
+++ b/projects/libphonenumber/phonefuzz.cc
@@ -0,0 +1,48 @@
+/* Copyright 2020 Google Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+#include "phonenumbers/phonenumbermatcher.h"
+#include <string>
+#include <vector>
+
+#include <unicode/unistr.h>
+
+#include "phonenumbers/base/basictypes.h"
+#include "phonenumbers/base/memory/scoped_ptr.h"
+#include "phonenumbers/base/memory/singleton.h"
+#include "phonenumbers/default_logger.h"
+#include "phonenumbers/phonenumber.h"
+#include "phonenumbers/phonenumber.pb.h"
+#include "phonenumbers/phonenumbermatch.h"
+#include "phonenumbers/phonenumberutil.h"
+#include "phonenumbers/stringutil.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+    if (size < 75)
+        return 0;
+
+    std::string input(reinterpret_cast<const char*>(data), 60);
+    data += 60;
+    size -= 60;
+    std::string input2(reinterpret_cast<const char*>(data), size);
+
+    i18n::phonenumbers::PhoneNumberUtil *phone_util = i18n::phonenumbers::PhoneNumberUtil::GetInstance();
+    i18n::phonenumbers::PhoneNumber parsed;
+    phone_util->Parse(input, input2, &parsed);
+    phone_util->IsValidNumber(parsed);
+    phone_util->GetCountryCodeForRegion(input);
+
+    return 0;
+}
diff --git a/projects/libphonenumber/project.yaml b/projects/libphonenumber/project.yaml
new file mode 100644
index 000000000..a6f67c072
--- /dev/null
+++ b/projects/libphonenumber/project.yaml
@@ -0,0 +1,10 @@
+homepage: "https://github.com/google/libphonenumber/"
+primary_contact: "david@adalogics.com"
+language: c++
+auto_ccs:
+  - "david@adalogics.com"
+fuzzing_engines:
+  - libfuzzer
+  - honggfuzz
+sanitizers:
+  - address