AS9583 — SIFY-AS-IN - Sify Limited

AS9583 announces 640 IPv4 prefixes covering 786,688 addresses and 1 IPv6 prefixes.

About this network

AS9583 (SIFY-AS-IN) is held by Sify Limited, now Sify Technologies, an Indian ICT company formerly known as Satyam Infoway. Sify was India's first private ISP and today sells enterprise connectivity over a national MPLS backbone, plus data-centre colocation, cloud and managed services. AS9583 is by far the largest AS in this part of the number range.

What it's used for

This is a carrier. RIS shows 2,187 IPv4 prefixes covering 795,648 addresses, 34 IPv6 prefixes, and — the figure that settles the role — 826 observed neighbours. An access network serving only its own subscribers peers with a handful of upstreams; 826 adjacencies means a large downstream customer cone plus heavy presence on the Indian exchanges. Sify runs a national network with thousands of points of presence, and the neighbour count is what that looks like in the routing table.

The eyeball side has not gone away. The largest blocks are a 223.30.0.0/15 and a long run of /20s out of 118.94.0.0/15, and reverse DNS across those /20s resolves address after address to retail.dynamic.sify.net, with 223-30-0-0.lan.sify.net and segment-95-118.sify.net filling in the rest. Retail and dynamic are broadband-pool words. The deaggregation into thousands of small prefixes fits the same picture: many regional POPs with per-region pools, announced piecemeal rather than as clean aggregates.

Notable

• Treat this AS as mixed when geolocating or reputation-scoring. A hit in 118.94.0.0/15 is most likely an Indian consumer broadband address; elsewhere it is as likely to be an enterprise circuit or hosted service.
• The IPv6 deployment is real rather than decorative: a 2001:e48::/32 plus more-specific /48s.
• Sify operates data centres across India, so the AS carries hosted traffic alongside the retail pools.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 1.6.0.0/17
• 1.6.128.0/21
• 1.6.137.0/24
• 1.6.138.0/23
• 1.6.140.0/22
• 1.6.144.0/20
• 1.6.160.0/19
• 1.6.192.0/20
• 1.6.208.0/21
• 1.6.216.0/23
• 1.6.218.0/24
• 1.6.220.0/22
• 1.6.224.0/23
• 1.6.231.0/24
• 1.6.232.0/21
• 1.6.240.0/20
• 1.7.0.0/24
• 1.7.3.0/24
• 1.7.4.0/22
• 1.7.8.0/21
• 1.7.16.0/21
• 1.7.25.0/24
• 1.7.26.0/23
• 1.7.28.0/22
• 1.7.32.0/20
• 1.7.48.0/21
• 1.7.60.0/23
• 1.7.81.0/24
• 1.7.82.0/23
• 1.7.84.0/22
• 1.7.88.0/21
• 1.7.96.0/21
• 1.7.104.0/22
• 1.7.108.0/24
• 1.7.128.0/21
• 1.7.136.0/22
• 1.7.140.0/23
• 1.7.143.0/24
• 1.7.144.0/22
• 1.7.148.0/23
• 1.7.150.0/24
• 1.7.152.0/21
• 1.7.160.0/24
• 1.7.163.0/24
• 1.7.164.0/22
• 1.7.168.0/21
• 1.7.176.0/23
• 1.7.179.0/24
• 1.7.181.0/24
• 1.7.182.0/23
• 1.7.184.0/22
• 1.7.188.0/23
• 1.7.191.0/24
• 1.7.192.0/21
• 1.7.204.0/24
• 1.7.206.0/23
• 1.7.208.0/20
• 1.7.224.0/24
• 1.7.226.0/23
• 1.7.229.0/24
• 1.7.230.0/23
• 1.7.232.0/21
• 1.7.240.0/22
• 1.7.244.0/23
• 57.250.64.0/24
• 118.94.0.0/18
• 118.94.64.0/20
• 118.94.80.0/23
• 118.94.82.0/24
• 118.94.86.0/23
• 118.94.88.0/23
• 118.94.90.0/24
• 118.94.92.0/22
• 118.94.96.0/19
• 118.94.128.0/17
• 118.95.0.0/17
• 118.95.128.0/21
• 118.95.136.0/23
• 118.95.138.0/24
• 118.95.140.0/24
• 118.95.142.0/23
• 118.95.144.0/20
• 118.95.160.0/20
• 118.95.176.0/21
• 118.95.184.0/23
• 118.95.186.0/24
• 118.95.188.0/22
• 118.95.192.0/18
• 119.226.0.0/18
• 119.226.64.0/20
• 119.226.80.0/21
• 119.226.90.0/23
• 119.226.92.0/22
• 119.226.96.0/20
• 119.226.112.0/22
• 119.226.116.0/24
• 119.226.118.0/23
• 119.226.120.0/21
• 119.226.128.0/18
• 119.226.192.0/20

and 541 more.

Upstream networks

• AS55836 Reliance Jio Infocomm Limited
• AS7473 Singapore Telecommunications Ltd
• AS6453 TATA COMMUNICATIONS (AMERICA) INC
• AS3320 Deutsche Telekom AG
• AS6939 Hurricane Electric LLC
• AS1299 Arelion Sweden AB
• AS4755 TATA Communications formerly VSNL is Leading ISP
• AS24482 SG.GS
• AS38001 NewMedia Express Pte Ltd
• AS17639 Converge ICT Solutions Inc.
• AS9930 TIME dotCom Berhad No. 14, Jalan Majistret U1/26 Hicom Glenmarie Industrial Park 40150 Shah Alam Selangor, Malaysia
• AS2914 NTT America, Inc.
• AS132132 MyRepublic Ltd.
• AS9002 RETN Limited
• AS34019 Hivane Association
• AS25091 IP-Max SA
• AS174 Cogent Communications, LLC
• AS37721 Virtual Technologies & Solutions
• AS33891 Core-Backbone GmbH
• AS34549 meerfarbig GmbH & Co. KG
• AS50304 Blix Solutions AS
• AS37100 SEACOM Limited
• AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
• AS34927 iFog GmbH
• AS50673 Serverius Holding B.V.

Downstream networks

• AS58678 Intech Online Private Limited
• AS138296 Juweriyah Networks Private Limited
• AS132215 Powergrid Teleservices Limited
• AS17806 Tire-1 IP Transit Provider of Bangladesh
• AS153252 ELXIRE
• AS134375 Fusionnet Web Services Private Limited
• AS58659 Quest Consultancy Pvt Ltd
• AS132137 Shree Omkar Infocom Pvt Ltd
• AS134021 Airgenie Communications Private Limited
• AS17625 BlazeNet's Network
• AS134331 Smartlink Solutions Pvt. Ltd.
• AS137127 Navkar Supertech Pvt Ltd
• AS133296 Web Werks India Pvt. Ltd.
• AS132996 Threesa Infoway Pvt.Ltd.
• AS134928 Spiderlink Networks Pvt Ltd
• AS133278 Dehradun Enet Solutions Private Ltd
• AS56209 AIRLINK TELESERVICES PRIVATE LIMITED
• AS134319 Elyzium Technologies Pvt. Ltd.
• AS132976 Kings Broadband Pvt Ltd
• AS45415 Vasai Cable Pvt. Ltd.
• AS45536 Readylink Internet Services Limited
• AS133234 PLUSNET COMMUNICATION PVT. LTD.
• AS131169 # 26, Bannerghatta Road, J. P. Nagar, Phase III
• AS152565 JOY SERVICES
• AS134858 iForce Networks

Adjacent networks

• AS55836 Reliance Jio Infocomm Limited
• AS7473 Singapore Telecommunications Ltd
• AS6453 TATA COMMUNICATIONS (AMERICA) INC
• AS4755 TATA Communications formerly VSNL is Leading ISP
• AS1299 Arelion Sweden AB
• AS2914 NTT America, Inc.
• AS6939 Hurricane Electric LLC
• AS58678 Intech Online Private Limited
• AS3320 Deutsche Telekom AG
• AS138296 Juweriyah Networks Private Limited
• AS17806 Tire-1 IP Transit Provider of Bangladesh
• AS132215 Powergrid Teleservices Limited
• AS153252 ELXIRE
• AS152565 JOY SERVICES
• AS134928 Spiderlink Networks Pvt Ltd
• AS134375 Fusionnet Web Services Private Limited
• AS24482 SG.GS
• AS17639 Converge ICT Solutions Inc.
• AS38001 NewMedia Express Pte Ltd
• AS132996 Threesa Infoway Pvt.Ltd.
• AS150748 Gmax
• AS134331 Smartlink Solutions Pvt. Ltd.
• AS134021 Airgenie Communications Private Limited
• AS58659 Quest Consultancy Pvt Ltd
• AS133278 Dehradun Enet Solutions Private Ltd

Routing security

• RPKI: 2,049 valid, 5 invalid and 172 not-found announcements; 1,834 ROAs.
• ASPA: none published.
• IRR: 99% of announcements registered; 5,843 route objects.
• Listed in as-sets: AS-133001, AS-17117IMPORT, AS-AMS-IX-MUM-RS, AS-AMS-IX-MUM-RS, AS-AMS-IX-MUM-RS-SET-V6, AS-AMS-IX-MUM-RS-SETS, AS-AMS-IX-MUM-RS-SETS, AS-AMS-IX-MUM-RS-SETS-V6, AS-AMS-IX-MUM-RS-SETS-V6, AS-AMS-IX-MUM-RS-V6, AS-AMS-IX-MUM-RS-V6, AS-ANC-CUSTOMER-PROXY-REGISTER, AS-CA, AS-CN2, AS-CONNETU-FRIX, AS-CONNETU-LINX, AS-CWBHARTI, AS-CWCUSTEU, AS-FINECOM-PEERS-AMSIX, AS-FRANCEIX-MRS-LIST, AS-GBLXEU, AS-HURRICANEV6, AS-IIJ, AS-KDDCUSTOMER2, AS-MANDA-AMSIX-PEERS-V4.

Internet exchanges

• LINX LON1 — London, United Kingdom
• AMS-IX Amsterdam — Amsterdam, Netherlands
• Equinix Internet Exchange Singapore — Singapore, Singapore
• DE-CIX Mumbai — Mumbai, India
• Extreme IX Mumbai — Mumbai, India
• New York International Internet Exchange — New York, United States
• National Internet Exchange of India - Mumbai — Mumbai, India
• BroadBand Internet eXchange Singapore — Singapore, Singapore
• France-IX Marseille — Marseille, France
• National Internet Exchange of India - New Delhi — New Delhi, India
• UAE-IX — Dubai, United Arab Emirates
• AMS-IX Mumbai — Mumbai, India
• National Internet Exchange of India - Chennai — Chennai, India
• MX-IX Kolkata — Kolkata, India
• National Internet Exchange of India - Hyderabad — Hyderabad, India
• AMS-IX Hyderabad — Hyderabad, India
• AMS-IX Kolkata — Kolkata, India