diff --git a/util/copyrights b/util/copyrights
index a77958d087..e3f86dba55 100644
--- a/util/copyrights
+++ b/util/copyrights
@@ -2576,9 +2576,6 @@
 ./contrib/queryperf/configure.in		X	2001,2004,2007,2012,2018
 ./contrib/queryperf/input/sample.0		X	2001,2018
 ./contrib/queryperf/input/sample.1		X	2001,2018
-./contrib/queryperf/missing/addrinfo.h		X	2004,2018
-./contrib/queryperf/missing/getaddrinfo.c	X	2004,2018
-./contrib/queryperf/missing/getnameinfo.c	X	2004,2018
 ./contrib/queryperf/queryperf.c			X	2001,2002,2003,2004,2005,2007,2012,2013,2014,2018
 ./contrib/queryperf/utils/gen-data-queryperf.py	X	2003,2008,2016,2018
 ./contrib/scripts/check-secure-delegation.pl.in	PERL	2010,2012,2014,2016,2018
@@ -3392,7 +3389,6 @@
 ./lib/isc/include/isc/ht.h			C	2016,2017,2018
 ./lib/isc/include/isc/httpd.h			C	2006,2007,2008,2014,2016,2018
 ./lib/isc/include/isc/interfaceiter.h		C	1999,2000,2001,2004,2005,2006,2007,2016,2018
-./lib/isc/include/isc/ipv6.h			C	1999,2000,2001,2002,2004,2005,2007,2016,2017,2018
 ./lib/isc/include/isc/iterated_hash.h		C	2008,2014,2016,2018
 ./lib/isc/include/isc/json.h			C	2013,2015,2016,2018
 ./lib/isc/include/isc/lang.h			C	1999,2000,2001,2004,2005,2006,2007,2016,2018
@@ -3457,8 +3453,6 @@
 ./lib/isc/include/pkcs11/pkcs11.h		X	2014,2016,2018
 ./lib/isc/include/pkcs11/pkcs11f.h		X	2014,2016,2018
 ./lib/isc/include/pkcs11/pkcs11t.h		X	2014,2016,2018
-./lib/isc/inet_ntop.c				C	1996,1997,1998,1999,2000,2001,2004,2005,2007,2009,2016,2017,2018
-./lib/isc/inet_pton.c				C	1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2007,2013,2014,2016,2017,2018
 ./lib/isc/iterated_hash.c			C	2006,2008,2009,2016,2018
 ./lib/isc/lex.c					C	1998,1999,2000,2001,2002,2003,2004,2005,2007,2013,2014,2015,2016,2017,2018
 ./lib/isc/lfsr.c				C	1999,2000,2001,2002,2004,2005,2007,2016,2018
@@ -3506,7 +3500,6 @@
 ./lib/isc/sparc64/include/isc/atomic.h		C	2005,2007,2013,2016,2018
 ./lib/isc/stats.c				C	2009,2012,2013,2014,2015,2016,2017,2018
 ./lib/isc/string.c				C	1999,2000,2001,2003,2004,2005,2006,2007,2011,2012,2014,2015,2016,2018
-./lib/isc/strtoul.c				C	2003,2004,2005,2007,2014,2016,2018
 ./lib/isc/symtab.c				C	1996,1997,1998,1999,2000,2001,2004,2005,2007,2011,2012,2013,2016,2018
 ./lib/isc/task.c				C	1998,1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018
 ./lib/isc/taskpool.c				C	1999,2000,2001,2004,2005,2007,2011,2012,2013,2016,2018
@@ -3553,8 +3546,6 @@
 ./lib/isc/unix/file.c				C	2000,2001,2002,2004,2005,2007,2009,2011,2012,2013,2014,2015,2016,2017,2018
 ./lib/isc/unix/fsaccess.c			C	2000,2001,2004,2005,2006,2007,2016,2018
 ./lib/isc/unix/ifiter_getifaddrs.c		C	2003,2004,2005,2007,2008,2009,2014,2016,2018
-./lib/isc/unix/ifiter_ioctl.c			C	1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2014,2015,2016,2017,2018
-./lib/isc/unix/ifiter_sysctl.c			C	1999,2000,2001,2002,2003,2004,2005,2007,2014,2015,2016,2018
 ./lib/isc/unix/include/isc/dir.h		C	1999,2000,2001,2004,2005,2007,2016,2018
 ./lib/isc/unix/include/isc/keyboard.h		C	2000,2001,2004,2005,2007,2016,2018
 ./lib/isc/unix/include/isc/net.h		C	1999,2000,2001,2002,2003,2004,2005,2007,2008,2012,2013,2014,2016,2017,2018
@@ -3566,7 +3557,6 @@
 ./lib/isc/unix/include/isc/time.h		C	1998,1999,2000,2001,2004,2005,2006,2007,2008,2009,2012,2014,2015,2016,2017,2018
 ./lib/isc/unix/include/pkcs11/cryptoki.h	X	2014,2018
 ./lib/isc/unix/interfaceiter.c			C	1999,2000,2001,2002,2003,2004,2005,2007,2008,2014,2016,2017,2018
-./lib/isc/unix/ipv6.c				C	1999,2000,2001,2004,2005,2006,2007,2016,2018
 ./lib/isc/unix/keyboard.c			C	2000,2001,2004,2007,2016,2018
 ./lib/isc/unix/meminfo.c			C	2015,2016,2018
 ./lib/isc/unix/net.c				C	1999,2000,2001,2002,2003,2004,2005,2007,2008,2012,2013,2014,2015,2016,2017,2018