ASN 是什麼？
ASN（自治系統號碼）是網際網路上一個獨立運作路由的網路的編號，例如一家電信業者、一家雲端業者、一所大學或一家大公司。每個 AS 透過 BGP 向鄰居宣告自己負責的 IP 網段，其他網路因此知道該把流量送到哪裡。
AS 號碼由五大區域網際網路註冊機構（APNIC、RIPE NCC、ARIN、LACNIC、AFRINIC）分配。例如 AS3462 是中華電信 HiNet，AS13335 是 Cloudflare。
AS3356 Lumen (Level 3)
LEVEL3
AS3356 是 Lumen (Level 3)（LEVEL3）的自治系統號碼，由 ARIN 分配。 目前宣告 945 個 IPv4 前綴（2740萬 個位址）與 136 個 IPv6 前綴。
- 名稱LEVEL3
- 持有者Level 3 Parent, LLC
- 國家/地區
美國 - 註冊機構ARIN
- 分配日期2000-03-10
- IPv4945 個前綴 · 2740萬 個位址
- IPv6136 個前綴 · 123萬 個 /48
- 註冊組織
- 濫用檢舉
- 最近更新
鄰居
上游
下游
對等及其他
來自 RIPE 路由收集器看到的路徑，依經過的路徑數排序。
IPv4 前綴945
- 4.0.0.0/9
- 4.55.0.0/16
- 5.252.72.0/24
- 8.0.0.0/9
- 8.0.0.0/12
- 8.6.180.0/24
- 8.11.231.0/24
- 8.15.209.0/24
- 8.16.0.0/12
- 8.23.133.0/24
- 8.28.160.0/22
- 8.29.103.0/24
- 8.32.0.0/12
- 8.44.210.0/24
- 8.45.136.0/24
- 8.48.0.0/12
- 8.51.0.0/18
- 8.64.0.0/12
- 8.192.0.0/12
- 8.224.0.0/14
- 8.236.0.0/15
- 8.238.0.0/15
- 8.240.0.0/12
- 8.240.220.0/24
- 8.241.98.0/24
- 8.241.141.0/24
- 8.241.142.0/24
- 8.241.144.0/24
- 8.241.174.0/24
- 8.241.175.0/24
- 8.241.176.0/24
- 8.241.177.0/24
- 8.241.178.0/24
- 8.242.0.0/17
- 8.242.0.0/19
- 8.242.32.0/19
- 8.242.68.0/22
- 8.242.68.0/23
- 8.242.71.0/24
- 8.242.72.0/21
- 8.242.92.0/22
- 8.242.245.0/24
- 8.242.246.0/24
- 8.243.0.0/19
- 8.243.32.0/19
- 8.243.64.0/19
- 8.243.96.0/19
- 8.243.128.0/20
IPv6 前綴136
- 2001:428:3816::/48
- 2001:428:5805::/48
- 2001:428:6400::/48
- 2001:13b0:8013::/48
- 2001:13b0:8015::/48
- 2001:13b0:8021::/48
- 2001:13b0:8029::/48
- 2001:13b0:a031::/48
- 2001:13b0:a301::/48
- 2001:13b0:b900::/48
- 2001:13b0:c000::/48
- 2001:13b2::/31
- 2001:13b2:1::/48
- 2001:13b2:8001::/48
- 2001:13b2:8002::/48
- 2001:13b2:8006::/48
- 2001:13b2:8007::/48
- 2001:13b2:800a::/48
- 2001:13b2:800b::/48
- 2001:13b2:800c::/48
- 2001:13b2:8011::/48
- 2001:13b2:8012::/48
- 2001:13b2:8014::/48
- 2001:13b2:8016::/48
- 2001:13b2:8018::/48
- 2001:13b2:8019::/48
- 2001:13b2:801a::/48
- 2001:13b2:801b::/48
- 2001:13b2:801e::/48
- 2001:13b2:8041::/48
- 2001:13b2:8044::/48
- 2001:13b2:8051::/48
- 2001:13b2:8054::/48
- 2001:13b2:9002::/48
- 2001:13b2:9003::/48
- 2001:13b2:9006::/48
- 2001:13b2:9009::/48
- 2001:13b2:9018::/48
- 2001:13b2:9019::/48
- 2001:13b2:9101::/48
- 2001:13b2:b000::/48
- 2001:13b2:b001::/48
- 2001:13b2:b801::/48
- 2001:13b2:ba01::/48
- 2001:13b2:ba10::/48
- 2001:13b2:bc00::/48
- 2001:13b2:bc01::/48
- 2001:13b2:bc09::/48
同一機構的其他 ASN共 39 個
- AS1 LVLT-1
- AS202 CENTURYLINK-LEGACY-LVLT-202
- AS203 CENTURYLINK-LEGACY-LVLT-203
- AS596 CENTURYLINK-LEGACY-LVLT-596
- AS3549 LVLT-3549
- AS10753 LUMEN-LEGACY-L3-CUSTOMER-SHARED-USE
- AS18756 PATEAM
- AS19094 RESERVED-IPADMIN
- AS189 LUMEN-LEGACY-L3-PARTITION
- AS199 CENTURYLINK-LEGACY-LVLT-199
- AS200 CENTURYLINK-LEGACY-LVLT-200
- AS201 CENTURYLINK-LEGACY-LVLT-201
- AS279 LVLT-279
- AS281 LVLT-281
- AS560 LVLT-560
- AS594 CENTURYLINK-LEGACY-LVLT-594
- AS595 CENTURYLINK-LEGACY-LVLT-595
- AS597 CENTURYLINK-LEGACY-LVLT-597
- AS598 CENTURYLINK-LEGACY-LVLT-598
- AS2551 RESERVED-IPADMIN
- AS3508 CENTURYLINK-LEGACY-TW-COMM
- AS3831 RESERVED-IPADMIN
- AS4323 CENTURYLINK-LEGACY-TWTC
- AS6395 LVLT-6395