$ query “AS37133” --type=asn → 1 result(s)
AS37133 · ZAIN-TANZANIA-AS
Zain Tanzania AS
AS37133 is operated by Zain Tanzania AS and serves as a mid-size transit provider, based in Tanzania since 2009. The system announces a respectable 64 512 IPv4 addresses, and supports IPv6. The bulk of its IP address space is in Tanzania.
- #4 in Tanzania — Top 10 by reach within country
Basic Information
- Country
- 🇹🇿 Tanzania
- Category
- Hosting
- Network Role
- Mid-size Transit
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- November 09, 2009
- Last Changed
- May 10, 2026
- Last Seen
- June 08, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 91 / 25
- IPv6 Prefixes (raw / aggregated)
- 1 / 1
- IPv4 Addresses
- 64 512
- Largest IPv4 Prefix
- /17 (32 768 addresses)
- Largest IPv6 Prefix
- /32
- Geolocated Countries
- 🇹🇿 Tanzania (69 120 IPs)
- Prefix Changed
- March 05, 2026
Reputation
- Reputation
- Good — 4 flagged IPs out of 64 512 total (0.01%)
Connectivity Summary
- Upstream Providers
- 3 upstreams providing transit
- Peers
- 4 networks exchanging traffic without transit
- Downstream Customers
- 13 downstreams buying transit
- Unclassified
- 1 unclassified BGP neighbor
- Degree
- 21 unique BGP neighbors
- Reach
- 34 networks in customer cone
Upstream Providers (3)
Prefix Lists
IPv4 Prefixes (91 total)
- 156.158.0.0/17 (32 768 addresses (/17 prefix))
- 156.156.128.0/19 (8 192 addresses (/19 prefix))
- 197.186.64.0/20 (4 096 addresses (/20 prefix))
- 41.75.208.0/20 (4 096 addresses (/20 prefix))
- 197.186.56.0/21 (2 048 addresses (/21 prefix))
- 197.186.40.0/21 (2 048 addresses (/21 prefix))
- 197.186.0.0/21 (2 048 addresses (/21 prefix))
- 197.186.16.0/22 (1 024 addresses (/22 prefix))
- 197.186.52.0/22 (1 024 addresses (/22 prefix))
- 197.186.32.0/22 (1 024 addresses (/22 prefix))
- 197.186.28.0/22 (1 024 addresses (/22 prefix))
- 197.186.38.0/23 (512 addresses (/23 prefix))
- 156.156.68.0/23 (512 addresses (/23 prefix))
- 102.212.82.0/23 (512 addresses (/23 prefix))
- 197.186.26.0/23 (512 addresses (/23 prefix))
- 196.46.122.0/23 (512 addresses (/23 prefix))
- 197.186.8.0/23 (512 addresses (/23 prefix))
- 197.186.37.0/24 (256 addresses (/24 prefix))
- 197.186.10.0/24 (256 addresses (/24 prefix))
- 196.46.121.0/24 (256 addresses (/24 prefix))
- 197.186.48.0/24 (256 addresses (/24 prefix))
- 197.186.15.0/24 (256 addresses (/24 prefix))
- 156.156.66.0/24 (256 addresses (/24 prefix))
- 197.186.25.0/24 (256 addresses (/24 prefix))
- 197.186.80.0/24 (256 addresses (/24 prefix))
IPv6 Prefixes (1 total)
- 2c0f:f2f8::/32