| Number of IPs | 1,843,712 |
| Number of CIDRs | 1,050 |
| Registration Date | 2008-09-04 |
| Last Changed Date | 2020-09-03 |
| Abuse Email | [email protected] |
| Abuse Tel | +86-10-62785933 |
An Autonomous System Number (ASN) contact information refers to the contact details associated with the entity or organization that holds and operates a specific ASN. The contact information typically includes the name of the organization, mailing address, email address, phone number, and other relevant contact details. Here is the contact information for AS4538.
| Administrative Tel | +86-10-2595931 |
| Technical Tel | +86-10-2595931 |
| Administrative EMAIL | [email protected] |
| Technical EMAIL | [email protected] |
| Abuse Tel | +86-10-62785933 |
| Abuse EMAIL | [email protected] |
An ASN can be associated with one or more CIDR prefixes. This means that an ASN may control one or more CIDR prefixes that will be used to define the IP address space for that autonomous system. Here is the CIDR list for ASN 4538.
| CIDR | NUMS OF IPS |
|---|---|
| 1.51.0.0/19 | 8,192 |
| 1.51.56.0/21 | 2,048 |
| 1.51.64.0/18 | 16,384 |
| 1.51.128.0/17 | 32,768 |
| 1.184.0.0/15 | 131,072 |
| 42.244.0.0/16 | 65,536 |
| 42.245.0.0/17 | 32,768 |
| 42.245.128.0/18 | 16,384 |
| 42.245.192.0/24 | 256 |
| 42.245.198.0/24 | 256 |
| 42.245.208.0/24 | 256 |
| 42.245.247.0/24 | 256 |
| 42.246.0.0/15 | 131,072 |
| 49.52.0.0/14 | 262,144 |
| 49.120.0.0/14 | 262,144 |
| 49.141.0.0/16 | 65,536 |
| 49.208.0.0/15 | 131,072 |
| 58.154.0.0/15 | 131,072 |
| 58.192.0.0/13 | 524,288 |
| 58.200.0.0/18 | 16,384 |
| 58.200.64.0/19 | 8,192 |
| 58.200.96.0/20 | 4,096 |
| 58.200.112.0/22 | 1,024 |
| 58.200.116.0/23 | 512 |
IP addresses identify individual devices on the internet, while ASNs identify collections of IP networks under the control of a single administrative entity. Below is a comprehensive list of all IP details for the CIDR block 1.51.0.0/19 within ASN 4538, including the count of domains, nameservers, and mailservers associated with it.
| IP | NUMS OF DOMAINS | MX | NS | CNAME |
|---|---|---|---|---|
| 1.51.29.58 | 1 | - | - | - |
RDAP stands for Registration Data Access Protocol. It is a protocol used to access and retrieve registration data for internet resources such as domain names, IP addresses, and autonomous system numbers. RDAP has several advantages over the WHOIS protocol, including support for internationalization, secure access to data, and the ability to provide differentiated access to registration data. Here is the RDAP raw data for AS4538.
| Country | CN |
| Name | ERX-CERNET-BKB |
| Registration Date | 2008-09-04 |
| Last Changed Date | 2020-09-03 |
| Administrative Tel | +86-10-2595931 |
| Technical Tel | +86-10-2595931 |
| Administrative EMAIL | [email protected] |
| Technical EMAIL | [email protected] |
| Abuse Tel | +86-10-62785933 |
| Abuse EMAIL | [email protected] |
1{
2 "rdapConformance": [
3 "history_version_0",
4 "nro_rdap_profile_0",
5 "nro_rdap_profile_asn_hierarchical_0",
6 "cidr0",
7 "rdap_level_0"
8 ],
9 "notices": [
10 {
11 "title": "Source",
12 "description": [
13 "Objects returned came from source",
14 "APNIC"
15 ]
16 },
17 {
18 "title": "Terms and Conditions",
19 "description": [
20 "This is the APNIC WHOIS Database query service. The objects are in RDAP format."
21 ],
22 "links": [
23 {
24 "value": "https://rdap.apnic.net/autnum/4538",
25 "rel": "terms-of-service",
26 "href": "http://www.apnic.net/db/dbcopyright.html",
27 "type": "text/html"
28 }
29 ]
30 },
31 {
32 "title": "Whois Inaccuracy Reporting",
33 "description": [
34 "If you see inaccuracies in the results, please visit: "
35 ],
36 "links": [
37 {
38 "value": "https://rdap.apnic.net/autnum/4538",
39 "rel": "inaccuracy-report",
40 "href": "https://www.apnic.net/manage-ip/using-whois/abuse-and-spamming/invalid-contact-form",
41 "type": "text/html"
42 }
43 ]
44 }
45 ],
46 "country": "CN",
47 "events": [
48 {
49 "eventAction": "registration",
50 "eventDate": "2008-09-04T06:40:34Z"
51 },
52 {
53 "eventAction": "last changed",
54 "eventDate": "2020-09-03T09:16:15Z"
55 }
56 ],
57 "name": "ERX-CERNET-BKB",
58 "remarks": [
59 {
60 "description": [
61 "China Education and Research Network Center",
62 "Tsinghua University",
63 "Beijing 100084"
64 ],
65 "title": "description"
66 },
67 {
68 "description": [
69 "This aut-num object created as part of",
70 "the ER-Transfer from ARIN"
71 ],
72 "title": "remarks"
73 }
74 ],
75 "links": [
76 {
77 "value": "https://rdap.apnic.net/autnum/4538",
78 "rel": "self",
79 "href": "https://rdap.apnic.net/autnum/4538",
80 "type": "application/rdap+json"
81 },
82 {
83 "value": "https://rdap.apnic.net/autnum/4538",
84 "rel": "related",
85 "href": "https://netox.apnic.net/search/AS4538?utm_source=rdap&utm_medium=result&utm_campaign=rdap_result",
86 "type": "text/html"
87 }
88 ],
89 "status": [
90 "active"
91 ],
92 "handle": "AS4538",
93 "endAutnum": 4538,
94 "startAutnum": 4538,
95 "objectClassName": "autnum",
96 "entities": [
97 {
98 "roles": [
99 "administrative",
100 "technical"
101 ],
102 "events": [
103 {
104 "eventAction": "registration",
105 "eventDate": "2008-09-04T07:29:20Z"
106 },
107 {
108 "eventAction": "last changed",
109 "eventDate": "2008-09-04T07:29:20Z"
110 }
111 ],
112 "remarks": [
113 {
114 "description": [
115 "This person object created as part of the ER-Transfer from ARIN"
116 ],
117 "title": "remarks"
118 }
119 ],
120 "links": [
121 {
122 "value": "https://rdap.apnic.net/autnum/4538",
123 "rel": "self",
124 "href": "https://rdap.apnic.net/entity/JW410-AP",
125 "type": "application/rdap+json"
126 }
127 ],
128 "vcardArray": [
129 "vcard",
130 [
131 [
132 "version",
133 {},
134 "text",
135 "4.0"
136 ],
137 [
138 "fn",
139 {},
140 "text",
141 "Jianping Wu"
142 ],
143 [
144 "kind",
145 {},
146 "text",
147 "individual"
148 ],
149 [
150 "adr",
151 {
152 "label": "China Education and Research Network Center\nTsinghua University\nBeijing 100084"
153 },
154 "text",
155 [
156 "",
157 "",
158 "",
159 "",
160 "",
161 "",
162 ""
163 ]
164 ],
165 [
166 "tel",
167 {
168 "type": "voice"
169 },
170 "text",
171 "+86-10-2595931"
172 ],
173 [
174 "email",
175 {},
176 "text",
177 "[email protected]"
178 ]
179 ]
180 ],
181 "objectClassName": "entity",
182 "handle": "JW410-AP"
183 },
184 {
185 "roles": [
186 "abuse"
187 ],
188 "events": [
189 {
190 "eventAction": "registration",
191 "eventDate": "2010-11-26T03:14:01Z"
192 },
193 {
194 "eventAction": "last changed",
195 "eventDate": "2023-05-26T07:44:58Z"
196 }
197 ],
198 "remarks": [
199 {
200 "description": [
201 "timezone GMT+8",
202 "http://www.ccert.edu.cn",
203 "[email protected] was validated on 2023-05-26"
204 ],
205 "title": "remarks"
206 }
207 ],
208 "links": [
209 {
210 "value": "https://rdap.apnic.net/autnum/4538",
211 "rel": "self",
212 "href": "https://rdap.apnic.net/entity/IRT-CERNET-AP",
213 "type": "application/rdap+json"
214 }
215 ],
216 "vcardArray": [
217 "vcard",
218 [
219 [
220 "version",
221 {},
222 "text",
223 "4.0"
224 ],
225 [
226 "fn",
227 {},
228 "text",
229 "IRT-CERNET-AP"
230 ],
231 [
232 "kind",
233 {},
234 "text",
235 "group"
236 ],
237 [
238 "adr",
239 {
240 "label": "Network Research Center,\nMain Bldg, Tsinghua Univ\nBeijing 100084, China"
241 },
242 "text",
243 [
244 "",
245 "",
246 "",
247 "",
248 "",
249 "",
250 ""
251 ]
252 ],
253 [
254 "tel",
255 {
256 "type": "voice"
257 },
258 "text",
259 "+86-10-62784301"
260 ],
261 [
262 "tel",
263 {
264 "type": "fax"
265 },
266 "text",
267 "+86-10-62785933"
268 ],
269 [
270 "email",
271 {},
272 "text",
273 "[email protected]"
274 ],
275 [
276 "email",
277 {
278 "pref": "1"
279 },
280 "text",
281 "[email protected]"
282 ]
283 ]
284 ],
285 "objectClassName": "entity",
286 "handle": "IRT-CERNET-AP"
287 }
288 ],
289 "port43": "whois.apnic.net"
290}The network coverage of AS4538 is worldwide. It covers multiple regions and countries
The AS Name of AS4538 is Asia Pacific Network Information Centre