ResearchRouting table, looking glass, RPKI & IRR

204.237.128.0/17 GTT Communications Inc.

Announced by AS3257 GTT Communications Inc. RPKI not found Seen by 5 of our 5 looking glass sessions.

Summary

What the table says about 204.237.128.0/17

Prefix
204.237.128.0/17
Origin
AS3257 GTT-BACKBONE
RPKI
RPKI not found
Size
32,768 addresses
Less specific
none
More specifics
43
IRR route objects
1 exact, 0 covering
In RouteViews
2026-10-15 12:02 UTC
Paths

How 204.237.128.0/17 is reached

Every path our looking glass collectors hold for this exact prefix. Open one for its attributes, or see them all side by side in the looking glass.

AS36601 TNT (TNT - Tampa, FL)Collector-1-TAMPA-FL36601 174 3257
OriginAS3257 GTT Communications Inc.
Origin codeIGP
Communities174:21000 174:22013 36601:150 36601:174 36601:2001
Updated7d 10h ago
AS903 UNIFIED-COMMUNICATIONS-TECHNOLOGIES (UCT - Valdosta, GA)Collector-2-COCOA-FL903 13760 7029 3257
OriginAS3257 GTT Communications Inc.
Origin codeIGP
Communities903:900 903:13760
Updated7d 18h ago
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Cocoa, FL)Collector-2-COCOA-FL36295 6461 3257
OriginAS3257 GTT Communications Inc.
Origin codeIGP
Communities6461:5997 36295:100 36295:6461
Updated20h 21m ago
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Jacksonville, FL)Collector-2-COCOA-FL36295 174 3257
OriginAS3257 GTT Communications Inc.
Origin codeIGP
Communities174:21000 174:22013
Updated7d 18h ago
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Orlando, FL)Collector-2-COCOA-FL36295 174 3257
OriginAS3257 GTT Communications Inc.
Origin codeIGP
Communities174:21000 174:22013 36295:100 36295:174
Updated11d 11h ago
RPKI

Route origin authorizations

No ROA covers this prefix, so RPKI has nothing to say about who may originate it. Validate another origin.

IRR

Route objects

Registered in the IRR for this prefix and the ones covering it. Look it up live.

RouteOriginSourceDescriptionMaintained by
204.237.128.0/17AS4436 AS-GTT-4436RADBMzima ARIN block 9MAINT-AS3257
More specific

Prefixes inside 204.237.128.0/17

43 announced prefixes fall inside this one.

Show the 43 prefixes
204.237.128.0/23 AS20001 TWC-20001-PACWEST204.237.132.0/24 AS396229 EQUUS204.237.133.0/24 AS62713 AS-PUBMATIC204.237.134.0/24 AS63099 MADEALA TELECOM TECHNOLOGY204.237.136.0/22 AS2914 NTT-DATA-2914204.237.140.0/23 AS20001 TWC-20001-PACWEST204.237.144.0/22 AS2914 NTT-DATA-2914204.237.148.0/22 AS2914 NTT-DATA-2914204.237.152.0/22 AS2914 NTT-DATA-2914204.237.156.0/22 AS2914 NTT-DATA-2914204.237.162.0/24 AS63099 MADEALA TELECOM TECHNOLOGY204.237.172.0/23 AS20001 TWC-20001-PACWEST204.237.174.0/24 AS63099 MADEALA TELECOM TECHNOLOGY204.237.177.0/24 AS63099 MADEALA TELECOM TECHNOLOGY204.237.178.0/24 AS63099 MADEALA TELECOM TECHNOLOGY204.237.180.0/23 AS20001 TWC-20001-PACWEST204.237.183.0/24 AS63099 MADEALA TELECOM TECHNOLOGY204.237.184.0/24 AS63099 MADEALA TELECOM TECHNOLOGY204.237.186.0/23 AS20940 AKAMAI-ASN1204.237.188.0/24 AS20940 AKAMAI-ASN1204.237.190.0/23 AS20001 TWC-20001-PACWEST204.237.192.0/23 AS20001 TWC-20001-PACWEST204.237.197.0/24 AS63099 MADEALA TELECOM TECHNOLOGY204.237.198.0/24 AS63099 MADEALA TELECOM TECHNOLOGY204.237.203.0/24 AS63099 MADEALA TELECOM TECHNOLOGY204.237.204.0/23 AS20001 TWC-20001-PACWEST204.237.208.0/23 AS20001 TWC-20001-PACWEST204.237.212.0/22 AS2914 NTT-DATA-2914204.237.216.0/22 AS3257 GTT-BACKBONE204.237.224.0/24 AS63099 MADEALA TELECOM TECHNOLOGY204.237.231.0/24 AS63099 MADEALA TELECOM TECHNOLOGY204.237.232.0/22 AS2914 NTT-DATA-2914204.237.236.0/24 AS63099 MADEALA TELECOM TECHNOLOGY204.237.238.0/24 AS63099 MADEALA TELECOM TECHNOLOGY204.237.240.0/22 AS2914 NTT-DATA-2914204.237.244.0/23 AS32596204.237.246.0/23 AS20001 TWC-20001-PACWEST204.237.248.0/23 AS17035 NBCUNI-17035204.237.250.0/24 AS63099 MADEALA TELECOM TECHNOLOGY204.237.251.0/24 AS395369 HPSAS001204.237.252.0/24 AS63099 MADEALA TELECOM TECHNOLOGY204.237.253.0/24 AS205615 SSC204.237.254.0/23 AS20001 TWC-20001-PACWEST
Tools

Check 204.237.128.0/17 live

Looking glassIP to ASN APIRPKI APIIRR API