# AS2REL

## Format

Relationship:
- `0`: asn1 and asn2 are peers. Any connection is considered peering.
- `1`: asn1 is the upstream of asn2, and asn2 is the downstream of asn1.

```
[
  {
    "asn1": 34288,
    "asn2": 50923,
    "paths_count": 144,
    "peers_count": 3,
    "rel": 0
  },
  {
    "asn1": 1299,
    "asn2": 5378,
    "paths_count": 239,
    "peers_count": 239,
    "rel": 1
  },
...
]
```

## Methodology

Upstream/downstream calculation is based on Ben Cox's bgp.tools' algorithm
https://bgp.tools/kb/what-is-a-upstream

6762 	Sparkle
12956 	Telefonica
2914 	NTT
3356 	Lumen
6453 	TATA
1239 	Sprint
701 	Verizon
6461 	Zayo
3257 	GTT
1299 	Telia
3491 	PCCW
7018 	AT&T
3320 	DTAG
5511 	Orange
6830 	Liberty Global
174 	Cogent
6939 	HE (IPv6 Only)