diff --git a/src/App/Validation.purs b/src/App/Validation.purs
index 5f4c15f..9b55964 100644
--- a/src/App/Validation.purs
+++ b/src/App/Validation.purs
@@ -1,6 +1,6 @@
 module App.Validation where
 
-import Prelude (class Eq, apply, map, otherwise, pure, show, ($), (&&), (<), (<<<), (<=), (<>), (>=))
+import Prelude (class Eq, apply, map, otherwise, pure, show, ($), (&&), (<), (<<<), (<=), (<>), (>=), between, bind)
 
 import Data.Validation.Semigroup (V, andThen, invalid, toEither)
 -- import Data.Array as A
@@ -15,9 +15,12 @@ import Data.Int (fromString)
 import URI.Host.IPv4Address as IPv4
 import URI.Host.IPv6Address as IPv6
 
+import Control.Alt ((<|>))
+
 import App.RR
 import App.AcceptedRRTypes (AcceptedRRTypes(..))
 import App.ResourceRecord (ResourceRecord)
+import GenericParser.SomeParsers as SomeParsers
 import GenericParser.Parser as G
 import GenericParser.IPAddress as IPAddress
 
@@ -45,6 +48,7 @@ data ValidationError
   = UNKNOWN
   | VEIPv4 (G.Error IPAddress.IPv4Error)
   | VEIPv6 (G.Error IPAddress.IPv6Error)
+  | VETTL (G.Error TTLError)
 
 type AVErrors = Array ValidationError
 
@@ -410,6 +414,16 @@ toRR_srv rrid readonly rrtype rrname ttl target priority port protocol weight
   = toRR rrid readonly rrtype rrname ttl target (Just priority) (Just port) (Just protocol) (Just weight)
          Nothing Nothing Nothing Nothing Nothing Nothing Nothing
 
+data TTLError
+  = NotInt
+  | NotBetween Int Int Int
+ttl_parser :: G.Parser TTLError Int
+ttl_parser = do pos <- G.current_position
+                n <- SomeParsers.nat <|> G.Parser \_ -> G.failureError pos (Just NotInt)
+                if between min_ttl max_ttl n 
+                then pure n
+                else G.Parser \_ -> G.failureError pos (Just $ NotBetween min_ttl max_ttl n)
+
 -- | `parse` allows to run any parser based on `GenericParser` and provide a validation error.
 -- | The actual validation error contains the parser's error including the position.
 parse :: forall e v. G.Parser e v -> String -> ((G.Error e) -> ValidationError) -> V AVErrors v
@@ -420,12 +434,12 @@ parse (G.Parser p) str c = case p { string: str, position: 0 } of
 validationA :: forall l. SimpleRR (|l) -> V AVErrors ResourceRecord
 validationA form = ado
   -- name   <- validate_name form.name
-  -- ttl    <- validate_ttl  form.ttl
+  ttl    <- parse ttl_parser form.ttl VETTL
   target <- parse IPAddress.ipv4 form.target VEIPv4
   -- in toRR_basic form.rrid form.readonly "A" name ttl target
-  in toRR_basic form.rrid form.readonly "A" form.name form.ttl target
+  in toRR_basic form.rrid form.readonly "A" form.name ttl target
 
 validation :: forall l. SRVRR (|l) -> AcceptedRRTypes -> Either AVErrors ResourceRecord
 validation entry t = case t of
-  A -> toEither <<< validationA entry
-  _ -> invalid $ UNKNOWN
+  A -> toEither $ validationA entry
+  _ -> toEither $ invalid [UNKNOWN]