Sify Limited

BGP inherited
Complete entity footprint
3 linked clusters · 2,868 netblocks · 2,266,908 IPv4 addresses
This organisation's clusters combined by evidence — shared operating domain sify.net — not name similarity, so genuinely different organisations that share a name are excluded.
View the full entity page →
Cluster stats
Netblocks2,230 · 1,059,951 IPv4 addresses
Registered in India (2,192) · Belgium (1) · United States (1)
All fragments 2,265 blocks across 6 clusters
Cluster ID208784590
RegistryAPNIC
Customersfind customers using this network →
Evidence & provenance ?
Attribution BGP parent (inherited)
Shared handles clustered on 25 shared RIR contact/maintainer handles
Registry names 5 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works

Footprint over time

5 weekly snapshots · JSON
2,231 +1 netblocks since 2026-07-05
2026-07-05 peak 2,231 2026-07-19

Domains hosted in this network

what's this?
billdesk.com

IP Ranges (2,230)

showing 50 of 2,230 — see all — ⬇ export CSV (free export limited to 500 rows — subscribe for the full export)
CIDR Org name Registry Status Confidence
61.0.248.0/25 Sify APNIC ASSIGNED NON-PORTABLE ● high
117.239.77.0 – 117.239.77.128 Sify APNIC ASSIGNED NON-PORTABLE ● high
2a0d:7100:6::/48 Sify Limited RIPE ASSIGNED ● high
1.6.0.0/22 Sify Limited BGP ANNOUNCED ● medium
1.6.1.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.2.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.4.0/22 Sify Limited BGP ANNOUNCED ● medium
1.6.7.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.8.0/22 Sify Limited BGP ANNOUNCED ● medium
1.6.9.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.10.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.11.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.12.0/22 Sify Limited BGP ANNOUNCED ● medium
1.6.12.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.13.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.16.0/22 Sify Limited BGP ANNOUNCED ● medium
1.6.17.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.19.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.20.0/22 Sify Limited BGP ANNOUNCED ● medium
1.6.24.0/22 Sify Limited BGP ANNOUNCED ● medium
1.6.28.0/22 Sify Limited BGP ANNOUNCED ● medium
1.6.31.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.32.0/22 Sify Limited BGP ANNOUNCED ● medium
1.6.36.0/22 Sify Limited BGP ANNOUNCED ● medium
1.6.40.0/22 Sify Limited BGP ANNOUNCED ● medium
1.6.42.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.43.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.44.0/22 Sify Limited BGP ANNOUNCED ● medium
1.6.46.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.48.0/22 Sify Limited BGP ANNOUNCED ● medium
1.6.52.0/22 Sify Limited BGP ANNOUNCED ● medium
1.6.52.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.54.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.56.0/22 Sify Limited BGP ANNOUNCED ● medium
1.6.59.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.60.0/22 Sify Limited BGP ANNOUNCED ● medium
1.6.60.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.64.0/22 Sify Limited BGP ANNOUNCED ● medium
1.6.65.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.66.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.67.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.68.0/22 Sify Limited BGP ANNOUNCED ● medium
1.6.69.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.70.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.71.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.72.0/22 Sify Limited BGP ANNOUNCED ● medium
1.6.72.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.73.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.74.0/24 Sify Limited BGP ANNOUNCED ● medium
1.6.75.0/24 Sify Limited BGP ANNOUNCED ● medium

Possibly related to this organisation

what's this?
Same operating domain sify.net
Separately-registered clusters whose addresses resolve (reverse DNS) under the same domain as this one — strong evidence they are the same organisation, even where the names differ. Namesakes on other domains are excluded.
Same name family
Separately-registered clusters whose names share “Sify” — often per-country or per-system registrations of the same brand, occasionally a different organisation sharing the name. Not counted in this organisation's own footprint.
Sub-allocations under carriers
IP blocks an ISP reassigned to a similarly-named customer — decoded from the ISP's own naming convention, not a direct registration.
  • Sify Technologies Ltd via COLT Technology Services Group Limited sub-allocation
  • Thane via Bharti Airtel Limited sub-allocation
  • Newdelhi via Bharti Airtel Limited sub-allocation
  • Kolkatta via Bharti Airtel Limited sub-allocation

Network trust

what's this?
RPKI hygiene: B how networks compare →
92.5% of checked blocks have valid RPKI ROA coverage (1,849 of 2,000, sampled from 2,230)
Possible discrepancies (4)

These blocks are registered to Sify Limited but cryptographically authorized for a different, unrelated network (3 distinct holders) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.

221.134.236.0/22 /22 authorized for AS583 — Air Force Systems Networking
1.7.229.0/24 /24 authorized for AS4755 — Tata Communications Limited
118.94.81.0/24 /24 authorized for AS13150 — CATO NETWORKS LTD
118.94.82.0/24 /24 authorized for AS13150 — CATO NETWORKS LTD

NIC Handles

AB1061-AP AS9583 CDN1-AP DUMY-RIPE DUMY-RIPE HS51-AP HS51-AP MAINT-IN-BBIL MAINT-IN-DOT MAINT-IN-IRINN MAINT-IN-IRINN MAINT-IN-NETCORE-INC +13 more