diff --git a/src/App/DisplayErrors.purs b/src/App/DisplayErrors.purs
index c8118f1..819d3c9 100644
--- a/src/App/DisplayErrors.purs
+++ b/src/App/DisplayErrors.purs
@@ -97,6 +97,7 @@ show_error_ip6 e = case e of
     Bulma.p "The IPv6 representation is erroneous. It should contain only up to 8 groups of hexadecimal characters."
   IPAddress.IP6IrrelevantShortRepresentation ->
     Bulma.p "IPv6 address has been unnecessarily shortened (with two ':')."
+  IPAddress.IP6InvalidRange -> Bulma.p "IPv6 address or range isn't valid."
 
 show_error_ip4 :: forall w i. IPAddress.IPv4Error -> HH.HTML w i
 show_error_ip4 e = case e of
@@ -104,6 +105,7 @@ show_error_ip4 e = case e of
     Bulma.p $ "IPv4 address contains a number too big (should be between 0 and 255). Current entered number: " <> show n
   IPAddress.IP4IrrelevantShortRepresentation ->
     Bulma.p "IPv4 address has been unnecessarily shortened (with two '.')."
+  IPAddress.IP4InvalidRange -> Bulma.p "IPv4 address or range isn't valid."
 
 show_error_txt :: forall w i. ValidationDNS.TXTError -> HH.HTML w i
 show_error_txt e = case e of
diff --git a/src/App/Validation/DNS.purs b/src/App/Validation/DNS.purs
index a7f4525..29cd776 100644
--- a/src/App/Validation/DNS.purs
+++ b/src/App/Validation/DNS.purs
@@ -1,6 +1,6 @@
 module App.Validation.DNS where
 
-import Prelude (apply, between, bind, map, pure, ($), (-), (<), (<$>), (<>))
+import Prelude (apply, between, bind, map, pure, ($), (-), (<), (<>))
 
 import Control.Alt ((<|>))
 import Data.Array as A
@@ -57,24 +57,15 @@ data Error
 type AVErrors = Array Error
 
 -- | Current default values.
-min_ttl :: Int
-min_ttl = 30
-max_ttl :: Int
-max_ttl = 86000
-max_txt :: Int
-max_txt = 500
-min_priority :: Int
-min_priority = 0
-max_priority :: Int
-max_priority = 65535
-min_port :: Int
-min_port = 0
-max_port :: Int
-max_port = 65535
-min_weight :: Int
-min_weight = 0
-max_weight :: Int
-max_weight = 65535
+min_ttl      =     30 :: Int
+max_ttl      =  86000 :: Int
+max_txt      =    500 :: Int
+min_priority =      0 :: Int
+max_priority =  65535 :: Int
+min_port     =      0 :: Int
+max_port     =  65535 :: Int
+min_weight   =      0 :: Int
+max_weight   =  65535 :: Int
 
 -- Functions handling network-related structures (ResourceRecord).
 
@@ -215,10 +206,10 @@ validate_SPF_mechanism m = case m.t of
     name <- parse (or_nothing DomainParser.sub_eof) m.v VESPFMechanismName
     in first m name -- name is discarded
   RR.IP4 -> ado
-    name <- parse IPAddress.ipv4 m.v VESPFMechanismIPv4
+    name <- parse (IPAddress.ipv4_range <|> IPAddress.ipv4) m.v VESPFMechanismIPv4
     in first m name -- name is discarded
   RR.IP6 -> ado
-    name <- parse IPAddress.ipv6 m.v VESPFMechanismIPv6
+    name <- parse (IPAddress.ipv6_range <|> IPAddress.ipv6) m.v VESPFMechanismIPv6
     in first m name -- name is discarded
   _ -> pure m