diff --git a/src/netaddress.h b/src/netaddress.h
--- a/src/netaddress.h
+++ b/src/netaddress.h
@@ -81,8 +81,10 @@
     bool IsRFC4193() const;
     // IPv6 Teredo tunnelling (2001::/32)
     bool IsRFC4380() const;
-    // IPv6 ORCHID (2001:10::/28)
+    // IPv6 ORCHID (deprecated) (2001:10::/28)
     bool IsRFC4843() const;
+    // IPv6 ORCHIDv2 (2001:20::/28)
+    bool IsRFC7343() const;
     // IPv6 autoconfig (FE80::/64)
     bool IsRFC4862() const;
     // IPv6 well-known prefix (64:FF9B::/96)
diff --git a/src/netaddress.cpp b/src/netaddress.cpp
--- a/src/netaddress.cpp
+++ b/src/netaddress.cpp
@@ -168,6 +168,11 @@
             (GetByte(12) & 0xF0) == 0x10);
 }
 
+bool CNetAddr::IsRFC7343() const {
+    return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x00 &&
+            (GetByte(12) & 0xF0) == 0x20);
+}
+
 bool CNetAddr::IsTor() const {
     return (memcmp(ip, pchOnionCat, sizeof(pchOnionCat)) == 0);
 }
@@ -235,7 +240,7 @@
     return IsValid() &&
            !(IsRFC1918() || IsRFC2544() || IsRFC3927() || IsRFC4862() ||
              IsRFC6598() || IsRFC5737() || (IsRFC4193() && !IsTor()) ||
-             IsRFC4843() || IsLocal() || IsInternal());
+             IsRFC4843() || IsRFC7343() || IsLocal() || IsInternal());
 }
 
 bool CNetAddr::IsInternal() const {
diff --git a/src/test/netbase_tests.cpp b/src/test/netbase_tests.cpp
--- a/src/test/netbase_tests.cpp
+++ b/src/test/netbase_tests.cpp
@@ -57,6 +57,7 @@
     BOOST_CHECK(ResolveIP("FC00::").IsRFC4193());
     BOOST_CHECK(ResolveIP("2001::2").IsRFC4380());
     BOOST_CHECK(ResolveIP("2001:10::").IsRFC4843());
+    BOOST_CHECK(ResolveIP("2001:20::").IsRFC7343());
     BOOST_CHECK(ResolveIP("FE80::").IsRFC4862());
     BOOST_CHECK(ResolveIP("64:FF9B::").IsRFC6052());
     BOOST_CHECK(ResolveIP("FD87:D87E:EB43:edb1:8e4:3588:e546:35ca").IsTor());