diff --git a/exts/ae7q.py b/exts/ae7q.py
index b11aeeb..8cf76c7 100644
--- a/exts/ae7q.py
+++ b/exts/ae7q.py
@@ -44,6 +44,14 @@ class AE7QCog(commands.Cog):
             base_url = "http://ae7q.com/query/data/CallHistory.php?CALL="
             embed = cmn.embed_factory(ctx)
 
+            if not callsign.isalnum():
+                embed = cmn.embed_factory(ctx)
+                embed.title = "AE7Q History for Callsign"
+                embed.colour = cmn.colours.bad
+                embed.description = "Not a valid callsign!"
+                await ctx.send(embed=embed)
+                return
+
             async with self.session.get(base_url + callsign) as resp:
                 if resp.status != 200:
                     raise cmn.BotHTTPError(resp)
@@ -110,6 +118,14 @@ class AE7QCog(commands.Cog):
             base_url = "http://ae7q.com/query/data/CallHistory.php?CALL="
             embed = cmn.embed_factory(ctx)
 
+            if not callsign.isalnum():
+                embed = cmn.embed_factory(ctx)
+                embed.title = "AE7Q Trustee History for Callsign"
+                embed.colour = cmn.colours.bad
+                embed.description = "Not a valid callsign!"
+                await ctx.send(embed=embed)
+                return
+
             async with self.session.get(base_url + callsign) as resp:
                 if resp.status != 200:
                     raise cmn.BotHTTPError(resp)
@@ -178,6 +194,14 @@ class AE7QCog(commands.Cog):
             base_url = "http://ae7q.com/query/data/CallHistory.php?CALL="
             embed = cmn.embed_factory(ctx)
 
+            if not callsign.isalnum():
+                embed = cmn.embed_factory(ctx)
+                embed.title = "AE7Q Application History for Callsign"
+                embed.colour = cmn.colours.bad
+                embed.description = "Not a valid callsign!"
+                await ctx.send(embed=embed)
+                return
+
             async with self.session.get(base_url + callsign) as resp:
                 if resp.status != 200:
                     raise cmn.BotHTTPError(resp)
@@ -250,6 +274,14 @@ class AE7QCog(commands.Cog):
             base_url = "http://ae7q.com/query/data/FrnHistory.php?FRN="
             embed = cmn.embed_factory(ctx)
 
+            if not frn.isdecimal():
+                embed = cmn.embed_factory(ctx)
+                embed.title = "AE7Q History for FRN"
+                embed.colour = cmn.colours.bad
+                embed.description = "Not a valid FRN!"
+                await ctx.send(embed=embed)
+                return
+
             async with self.session.get(base_url + frn) as resp:
                 if resp.status != 200:
                     raise cmn.BotHTTPError(resp)
@@ -313,6 +345,14 @@ class AE7QCog(commands.Cog):
             base_url = "http://ae7q.com/query/data/LicenseeIdHistory.php?ID="
             embed = cmn.embed_factory(ctx)
 
+            if not licensee_id.isalnum():
+                embed = cmn.embed_factory(ctx)
+                embed.title = "AE7Q History for Licensee"
+                embed.colour = cmn.colours.bad
+                embed.description = "Not a valid licensee ID!"
+                await ctx.send(embed=embed)
+                return
+
             async with self.session.get(base_url + licensee_id) as resp:
                 if resp.status != 200:
                     raise cmn.BotHTTPError(resp)
diff --git a/exts/qrz.py b/exts/qrz.py
index 0e79e4b..169635e 100644
--- a/exts/qrz.py
+++ b/exts/qrz.py
@@ -31,6 +31,14 @@ class QRZCog(commands.Cog):
         """Looks up a callsign on [QRZ.com](https://www.qrz.com/). Add `--link` to only link the QRZ page."""
         flags = [f.lower() for f in flags]
 
+        if not callsign.isalnum():
+            embed = cmn.embed_factory(ctx)
+            embed.title = "QRZ Data for Callsign"
+            embed.colour = cmn.colours.bad
+            embed.description = "Not a valid callsign!"
+            await ctx.send(embed=embed)
+            return
+
         if keys.qrz_user == "" or keys.qrz_pass == "" or "--link" in flags:
             await ctx.send(f"http://qrz.com/db/{callsign}")
             return